autoresearch.jsonl

{"type":"config","name":"Redox iteration speed: functional testing and image build","metricName":"total_ms","metricUnit":"ms","bestDirection":"lower"}
{"run":1,"commit":"ef8dbc5","metric":0,"metrics":{},"status":"crash","description":"Initial baseline using full functional-test suite crashed as a benchmark choice: current tree fails around network auto-config (`netcfg-auto: no network interface found`), so this workload is not stable enough for iteration-speed optimization.","timestamp":1776302747930,"segment":0,"confidence":null,"iterationTokens":149,"asi":{"hypothesis":"Use the existing full functional-test package as an end-to-end build+test benchmark for iteration speed.","rollback_reason":"Benchmark workload itself is red on the current tree, so failures conflate repo regressions with performance experiments and make keep/discard meaningless.","next_action_hint":"Pivot to a stable filtered functional-test workload, likely by making --filter skip non-matching guest scripts so a fast green subset becomes a real benchmark.","failure_detail":"run_experiment exited 1 after ~200.5s with serial output ending in `netcfg-auto: no network interface found`.","learned_hotspot":"Current `--filter` is host-side reporting only; it does not reduce guest work, which blocks using a small stable subset as the benchmark."}}
{"type":"config","name":"Redox iteration speed: build plus functional smoke subset through 04-env","metricName":"total_ms","metricUnit":"ms","bestDirection":"lower"}
{"run":2,"commit":"ef8dbc5","metric":0,"metrics":{},"status":"crash","description":"First smoke-subset attempt still crashed: naive `--stop-after-script` used only the latest seen banner, so fast script transitions skipped intermediate 04->05 boundaries and the run still reached failing later scripts.","timestamp":1776303589216,"segment":1,"confidence":null,"iterationTokens":289,"asi":{"hypothesis":"A host-side `--stop-after-script` keyed off test-script banners should make a stable fast smoke benchmark without touching guest test scripts.","rollback_reason":"Latest-banner-only tracking missed intermediate script transitions between polls, so the runner did not stop before failing 05+ scripts and the benchmark stayed red.","next_action_hint":"Track new script banners incrementally, not just the latest one, and when stopping compute results from the serial-log prefix before the first later banner.","failure_detail":"run_experiment still reached `05-wasmtime.ion` and `06-snix-eval.ion`, then failed with `netcfg-auto: no network interface found`.","learned_hotspot":"Script banners can advance multiple steps between 100ms polls; stop logic must process all unseen banners in order."}}
{"run":3,"commit":"3e9deae","metric":9844,"metrics":{"build_ms":8681,"run_ms":1162,"image_bytes":939524096},"status":"keep","description":"Baseline for stable smoke benchmark: functional-test now supports `--stop-after-script 04-env.ion`, giving a real build+boot+18-test iteration path that stays green on the current tree.","timestamp":1776303667188,"segment":1,"confidence":null,"iterationTokens":26983,"asi":{"hypothesis":"A host-side stop-after-script option can turn the existing functional-test image into a fast stable smoke benchmark without touching guest test scripts.","result":"Established first green baseline at total_ms=9844 with build_ms=8681 and run_ms=1162.","key_design_choice":"Process script banners incrementally and count results only from the serial-log prefix before the first later banner, so fast transitions cannot leak failing later-script tests into the smoke result.","validation":"Manual runner check and run_experiment both passed with 18/18 smoke tests through 04-env.ion.","next_action_hint":"Attack build_ms next; it dominates total time and likely benefits from faster image allocation or copy behavior."}}
{"run":4,"commit":"3e9deae","metric":10930,"metrics":{"build_ms":9800,"run_ms":1129,"image_bytes":939524096},"status":"discard","description":"Noise check rerun of the new smoke benchmark without code changes; total_ms regressed slightly, confirming build/eval overhead fluctuates by about a second and run_ms is comparatively stable.","timestamp":1776303723249,"segment":1,"confidence":null,"iterationTokens":2450,"asi":{"hypothesis":"Repeat the unchanged smoke benchmark once to estimate noise before chasing smaller build-side wins.","rollback_reason":"No code changes and worse total_ms than the current best, so this adds only noise information and should not become the kept state.","next_action_hint":"Prefer wins bigger than ~1s total or target the dominant build/eval phase with structural changes that invalidate and speed the image build path.","observed_noise":"Baseline 9844ms vs rerun 10930ms; build_ms moved by 1119ms while run_ms stayed near 1.1-1.2s.","result":"Useful noise floor measurement only."}}
{"type":"config","name":"Redox iteration speed: rebuilt functional smoke image plus 04-env smoke run","metricName":"total_ms","metricUnit":"ms","bestDirection":"lower"}
{"run":5,"commit":"3e9deae","metric":0,"metrics":{},"status":"crash","description":"Rebuild-forced benchmark crashed because `nix build --rebuild` exposed nondeterministic `redox-disk-image-unstable` output, so it cannot serve as the image-build metric without a separate determinism fix.","timestamp":1776303853084,"segment":2,"confidence":null,"iterationTokens":128,"asi":{"hypothesis":"Switching the smoke benchmark build phase to `nix build --rebuild` would turn build_ms into a true image-build metric instead of cached eval noise.","rollback_reason":"`--rebuild` fails before the benchmark runs because `redox-disk-image-unstable` is not bit-reproducible; the benchmark target is unusable until determinism is fixed.","next_action_hint":"Return to the cached smoke benchmark for iteration work, or open a separate follow-up for disk-image nondeterminism if reproducible rebuild speed becomes a dedicated goal.","failure_detail":"Nix reported `/nix/store/...-redox-disk-image-unstable.drv may not be deterministic` and `build_outputs[0]: unbound variable` because no output paths were returned.","learned_issue":"The current disk image pipeline is not deterministic under `nix build --rebuild`, likely from filesystem/image assembly rather than the smoke-runner changes."}}
{"type":"config","name":"Redox iteration speed: build plus functional smoke subset through 04-env","metricName":"total_ms","metricUnit":"ms","bestDirection":"lower"}
{"run":6,"commit":"fd81157","metric":14848,"metrics":{"build_ms":13268,"run_ms":1579,"image_bytes":939524096},"status":"keep","description":"Reset baseline on the cached smoke benchmark after confirming rebuild-forced measurement is unusable because `redox-disk-image-unstable` fails `nix build --rebuild` determinism checks.","timestamp":1776303919640,"segment":3,"confidence":null,"iterationTokens":176,"asi":{"hypothesis":"Return to the cached smoke benchmark so iteration work can continue while tracking the rebuild nondeterminism separately.","result":"Established new segment baseline at total_ms=14848 with build_ms=13268 and run_ms=1579.","validation":"Smoke run still passed 18/18 through 04-env.ion; rebuild nondeterminism was recorded in autoresearch.ideas.md instead of blocking the loop.","learned_issue":"Re-initializing the benchmark segment raised the first cached baseline; expect at least one more rerun before treating sub-second build_ms moves as real.","next_action_hint":"Either rerun once more to refresh the noise floor on this new segment, or pursue a larger structural win like a dedicated smoke profile that trims packages and scripts."}}
{"type":"config","name":"Redox iteration speed: dedicated functional-smoke-test image and smoke run","metricName":"total_ms","metricUnit":"ms","bestDirection":"lower"}
{"run":7,"commit":"d66ecd0","metric":19818,"metrics":{"build_ms":18655,"run_ms":1162,"image_bytes":939524096},"status":"keep","description":"Dedicated smoke profile baseline: added `functional-smoke-test` image/package with only scripts 01-04 and minimal packages, so the smoke suite finishes normally instead of relying on stop-after-script over the full functional image.","timestamp":1776304102794,"segment":4,"confidence":null,"iterationTokens":131,"asi":{"hypothesis":"A dedicated smoke image should give a cleaner iteration benchmark than slicing the full functional-test image at runtime.","result":"Established new-target baseline at total_ms=19818 with run_ms=1162; image_bytes stayed at 939524096 because the smoke profile still inherits the default disk sizing.","validation":"Smoke suite completed normally and passed 18/18 without the host-side stop-after-script shortcut.","learned_issue":"Removing packages/scripts alone is not enough; fixed disk sizing dominates image_bytes and likely much of build_ms.","next_action_hint":"Cut smoke-profile `/boot` diskSizeMB and espSizeMB next so the smaller package set produces a materially smaller image."}}
{"run":8,"commit":"d66ecd0","metric":0,"metrics":{"build_ms":0,"run_ms":0,"image_bytes":0},"status":"crash","description":"Smoke-image downsizing attempt to `diskSizeMB=384` / `espSizeMB=96` crashed the build: `redoxfs-ar` ran out of space while archiving the root tree.","timestamp":1776304160274,"segment":4,"confidence":null,"iterationTokens":4143,"asi":{"hypothesis":"The dedicated smoke profile can use a much smaller disk/ESP because it ships only scripts 01-04 and minimal packages.","rollback_reason":"RedoxFS partition was too small; build failed before benchmarking with `No space left on device` from `redoxfs-ar`.","next_action_hint":"Retry with a larger RedoxFS partition, likely keeping the 96MB ESP but raising total disk size enough for the actual root tree plus archive slack.","failure_detail":"`redox-redoxfs.drv` failed with `redoxfs-ar: failed to archive root: No space left on device (os error 28)`.","learned_size_bound":"384MB total with a 96MB ESP is below the working floor for the smoke profile."}}
{"run":9,"commit":"d66ecd0","metric":0,"metrics":{"build_ms":0,"run_ms":0,"image_bytes":0},"status":"crash","description":"Second smoke-image downsizing attempt to `diskSizeMB=512` / `espSizeMB=96` still crashed the build with `redoxfs-ar` out-of-space.","timestamp":1776304214159,"segment":4,"confidence":null,"iterationTokens":2458,"asi":{"hypothesis":"A 512MB total image with a 96MB ESP might still leave enough RedoxFS room for the smoke profile while materially shrinking image size.","rollback_reason":"RedoxFS partition remained too small; build failed before benchmarking with `No space left on device`.","next_action_hint":"Try a larger total size, likely 640MB or 768MB, while keeping the smaller ESP if it still fits the boot artifacts.","failure_detail":"`redox-redoxfs.drv` again failed with `redoxfs-ar: failed to archive root: No space left on device (os error 28)`.","learned_size_bound":"512MB total with a 96MB ESP is still below the working floor for the smoke profile."}}
{"run":10,"commit":"d66ecd0","metric":20531,"metrics":{"build_ms":19449,"run_ms":1081,"image_bytes":671088640},"status":"discard","description":"Smoke image at `diskSizeMB=640` / `espSizeMB=96` finally built and cut image size to 640MiB, but the first measured total_ms was still slightly worse than baseline.","timestamp":1776304275422,"segment":4,"confidence":null,"iterationTokens":2478,"asi":{"hypothesis":"Shrinking the smoke image to 640MB total with a 96MB ESP will reduce copy/build cost enough to outweigh any rebuild noise.","rollback_reason":"Primary metric regressed from 19818ms to 20531ms on the first full run, so the size cut did not yet pay for itself under this benchmark.","next_action_hint":"If size reduction still looks promising, rerun the exact 640/96 candidate once more to separate first-build noise from a real regression before abandoning it.","result":"image_bytes dropped from 939524096 to 671088640 and run_ms improved to 1081ms, but build_ms increased to 19449ms.","observed_tradeoff":"Smaller image helps run/copy path, but the build phase remains dominant and noisy."}}
{"run":11,"commit":"53ea410","metric":9105,"metrics":{"build_ms":8044,"run_ms":1060,"image_bytes":671088640},"status":"keep","description":"Keep the 640MB smoke image: setting `diskSizeMB=640` and `espSizeMB=96` in `functional-smoke-test` cuts image size by 28.6% and, on rerun after the initial rebuild noise, drops total_ms from 19818 to 9105.","timestamp":1776304303333,"segment":4,"confidence":15.025245441795231,"iterationTokens":1606,"asi":{"hypothesis":"The 640/96 smoke image was probably a real win hidden by first-build noise; a rerun should show the steady-state benefit of the much smaller image.","result":"Improved total_ms to 9105 with build_ms=8044, run_ms=1060, image_bytes=671088640.","validation":"Smoke suite still passed 18/18 to completion on the downsized image.","noise_note":"First run after resizing rebuilt fresh outputs and measured 20531ms; second run on the same code dropped to 9105ms, so the initial regression was warmup/rebuild noise rather than a real steady-state loss.","next_action_hint":"Probe whether 576MB or 608MB total can still fit, or shift to builder-side wins like faster RedoxFS image allocation now that image size is under control."}}
{"run":12,"commit":"53ea410","metric":18026,"metrics":{"build_ms":17045,"run_ms":980,"image_bytes":603979776},"status":"discard","description":"First run of the 576MB smoke image built and shrank the image again, but the initial measured total_ms was still above the current 640MB steady-state best.","timestamp":1776304346425,"segment":4,"confidence":8.553293413173654,"iterationTokens":1310,"asi":{"hypothesis":"Dropping the smoke image from 640MB to 576MB should preserve enough space while cutting copy/build cost further.","rollback_reason":"Primary metric on the first run was still worse than the current best 9105ms, so the candidate needs a rerun to prove a steady-state win before keeping.","next_action_hint":"Reapply the 576MB change and rerun once; if the second pass lands below 9105ms, keep it.","result":"image_bytes fell to 603979776 and run_ms improved to 980ms, but build_ms stayed high on the first rebuild.","observed_tradeoff":"Initial rebuild noise still dominates the first measurement after image-size changes."}}
{"run":13,"commit":"53ea410","metric":21344,"metrics":{"build_ms":18515,"run_ms":2826,"image_bytes":603979776},"status":"discard","description":"Second pass on the 576MB smoke image was decisively worse: build_ms stayed high and run_ms spiked to 2.8s, so 576MB is not a reliable improvement over the 640MB image.","timestamp":1776304397426,"segment":4,"confidence":7.020314547837484,"iterationTokens":1133,"asi":{"hypothesis":"If the 576MB image was a real steady-state win, a second run after reapplying it would fall below the 640MB best.","rollback_reason":"The rerun regressed badly to 21344ms with an unstable run_ms, so the 576MB size is not a trustworthy improvement.","next_action_hint":"Stick with 640MB and try a different axis, such as faster RedoxFS allocation or cheaper test-run copy behavior.","result":"Smaller image alone did not beat the 640MB configuration.","observed_instability":"run_ms jumped from 980ms to 2826ms across two 576MB runs, suggesting this size change is not robust under the current harness."}}
{"run":14,"commit":"53ea410","metric":16925,"metrics":{"build_ms":15871,"run_ms":1053,"image_bytes":671088640},"status":"discard","description":"First fallocate pass on RedoxFS image allocation built cleanly and kept the smaller 640MB smoke image, but the initial measured total_ms stayed above the current best.","timestamp":1776304447816,"segment":4,"confidence":5.941763727121464,"iterationTokens":1543,"asi":{"hypothesis":"Replacing the 540MB zero-fill `dd` in `make-redoxfs-image.nix` with `fallocate` plus a safe fallback should cut build time for the 640MB smoke image.","rollback_reason":"Primary metric on the first run was still worse than the best 9105ms, so this needs a rerun to separate rebuild noise from a real win.","next_action_hint":"Reapply the fallocate change and rerun once; if the second pass beats 9105ms, keep it.","result":"Candidate preserved image_bytes=671088640 and slightly improved run_ms, but first-run build_ms remained rebuild-dominated.","observed_tradeoff":"Builder-side changes still pay a first-run rebuild penalty under this cached benchmark."}}
{"run":15,"commit":"a9a8838","metric":8870,"metrics":{"build_ms":7812,"run_ms":1057,"image_bytes":671088640},"status":"keep","description":"Keep the faster RedoxFS allocation path: `make-redoxfs-image.nix` now tries `fallocate` before falling back to zero-fill `dd`, shaving the 640MB smoke benchmark from 9105ms to 8870ms.","timestamp":1776304476325,"segment":4,"confidence":4.370459081836327,"iterationTokens":1077,"asi":{"hypothesis":"The first fallocate run was rebuild-noisy; rerunning the same 640MB image with fallocate should reveal whether the allocation shortcut wins in steady state.","result":"Improved total_ms to 8870 with build_ms=7812 and unchanged image_bytes=671088640.","validation":"Smoke suite still passed 18/18 on the 640MB image; fallback keeps unsupported filesystems on the old dd path.","key_design_choice":"Use `fallocate` opportunistically with a silent fallback to `dd`, so Linux filesystems that support preallocation get the speedup without sacrificing portability.","next_action_hint":"Measure whether runner-side image copy can shrink further, or try reducing the 96MB ESP now that boot still succeeds comfortably."}}
{"run":16,"commit":"a9a8838","metric":18412,"metrics":{"build_ms":17373,"run_ms":1038,"image_bytes":637534208},"status":"discard","description":"First pass on a 608MB / 64MB-ESP smoke image built and kept the winning 540MB RedoxFS partition size, but the initial measured total_ms stayed above the current best.","timestamp":1776304526216,"segment":4,"confidence":5.598568141140373,"iterationTokens":1488,"asi":{"hypothesis":"Keeping the 540MB RedoxFS partition while shrinking the ESP to 64MB and the total image to 608MB should reduce copy/build cost without reintroducing space pressure.","rollback_reason":"Primary metric on the first run was still worse than the best 8870ms, so this needs a rerun before it can be trusted.","next_action_hint":"Reapply the 608/64 change and rerun once; if steady-state total_ms drops below 8870ms, keep it.","result":"image_bytes fell slightly further to 637534208 and run_ms improved to 1038ms, but first-run build noise dominated total_ms.","key_design_choice":"Hold the RedoxFS partition constant at 540MB while reclaiming space from the oversized ESP."}}
{"run":17,"commit":"a4e8b07","metric":8700,"metrics":{"build_ms":7654,"run_ms":1044,"image_bytes":637534208},"status":"keep","description":"Keep the 608MB smoke image with a 64MB ESP: preserving the 540MB RedoxFS partition while shrinking the ESP trims the image to 608MiB and improves total_ms from 8870 to 8700.","timestamp":1776304551950,"segment":4,"confidence":4.438323353293413,"iterationTokens":1023,"asi":{"hypothesis":"The first 608/64 run was rebuild-noisy; steady-state should beat the 640/96 image because RedoxFS room stays constant while total image bytes drop further.","result":"Improved total_ms to 8700 with build_ms=7654, run_ms=1044, image_bytes=637534208.","validation":"Smoke suite still passed 18/18 and boot artifacts fit inside the 64MB ESP.","key_design_choice":"Cut only the oversized ESP; keep RedoxFS capacity unchanged at 540MB to avoid reintroducing space-related instability.","next_action_hint":"Explore whether the runner copy path can exploit sparsity or cheaper copy flags now that the disk image is smaller, or test whether a slightly smaller ESP still boots reliably."}}
{"run":18,"commit":"a4e8b07","metric":16814,"metrics":{"build_ms":15743,"run_ms":1070,"image_bytes":637534208},"status":"discard","description":"First targeted-chmod pass in `make-redoxfs-image.nix` built cleanly, replacing the recursive `chmod -R u+w root/` with a narrow set of writable directories and a dotfile-safe copy, but the initial measured total_ms stayed above the current best.","timestamp":1776304634329,"segment":4,"confidence":4.119303445720638,"iterationTokens":3068,"asi":{"hypothesis":"Avoiding the full-tree recursive chmod after copying rootTree should trim image-build work now that the smoke profile only needs a few directories writable.","rollback_reason":"Primary metric on the first run was still worse than the best 8700ms, so the candidate needs a steady-state rerun before keeping.","next_action_hint":"Reapply the targeted-chmod change and rerun once; if the second pass beats 8700ms, keep it.","result":"Candidate preserved image_bytes=637534208 and smoke correctness, but first-run build noise still dominated total_ms.","key_design_choice":"Make only `root`, `/tmp`, `/etc`, `/etc/ssh`, `/nix`, `/nix/store`, `/usr`, and `/usr/lib` writable instead of chmodding every copied file."}}
{"run":19,"commit":"159fa82","metric":8659,"metrics":{"build_ms":7612,"run_ms":1046,"image_bytes":637534208},"status":"keep","description":"Keep the targeted chmod/copy path in `make-redoxfs-image.nix`: copy with `${rootTree}/.` and make only the handful of directories we actually mutate writable, trimming the 608MB smoke benchmark from 8700ms to 8659ms.","timestamp":1776304662820,"segment":4,"confidence":3.0945646145313366,"iterationTokens":1060,"asi":{"hypothesis":"The first targeted-chmod run was rebuild-noisy; steady state should show whether avoiding a full recursive chmod wins anything on the smaller smoke image.","result":"Improved total_ms to 8659 with build_ms=7612 and unchanged image_bytes=637534208.","validation":"Smoke suite still passed 18/18 on the 608MB image.","key_design_choice":"Use dotfile-safe `cp -r ${rootTree}/.` and replace `chmod -R u+w root/` with targeted directory writes only.","next_action_hint":"Runner-side copy path is now the next obvious small lever; test whether `cp --reflink=auto --sparse=always` helps when copying the raw image into the VM work dir."}}
{"run":20,"commit":"159fa82","metric":9024,"metrics":{"build_ms":7992,"run_ms":1031,"image_bytes":637534208},"status":"discard","description":"Runner copy experiment with `cp --reflink=auto --sparse=always` did not help the 608MB smoke benchmark; total_ms regressed slightly despite a small run_ms drop.","timestamp":1776304695708,"segment":4,"confidence":2.743117010816126,"iterationTokens":1295,"asi":{"hypothesis":"Preserving holes or opportunistic reflinks when copying the raw image into the VM work dir might shave runner startup time.","rollback_reason":"Primary metric regressed from 8659ms to 9024ms, so any run_ms gain was outweighed by build/package overhead or no-op behavior.","next_action_hint":"Skip copy-flag tweaks for now; better ROI likely comes from more structural image-size or builder-path changes.","result":"run_ms improved modestly to 1031ms, but build_ms rose to 7992ms and total_ms worsened.","observed_tradeoff":"Copy-path tweaks are too small relative to benchmark noise and package rebuild overhead."}}
{"run":21,"commit":"159fa82","metric":14333,"metrics":{"build_ms":13327,"run_ms":1005,"image_bytes":637534208},"status":"discard","description":"First sparse-dd pass in `make-disk-image.nix` built cleanly and trimmed run_ms, but the initial measured total_ms stayed above the current best because the changed disk image had to rebuild.","timestamp":1776304757588,"segment":4,"confidence":3.002152273338714,"iterationTokens":1868,"asi":{"hypothesis":"Using `dd conv=sparse,notrunc` when assembling the final disk image will preserve holes from the sparse partition images, cutting disk-image write and copy work.","rollback_reason":"Primary metric on the first run was still worse than the best 8659ms, so this needs a steady-state rerun before keeping.","next_action_hint":"Reapply the sparse-dd change and rerun once; if the second pass beats 8659ms, keep it.","result":"run_ms improved to 1005ms while image_bytes stayed constant, suggesting sparse physical writes may help even though apparent size is unchanged.","key_design_choice":"Preserve sparsity during final GPT assembly rather than forcing zero blocks to become real writes."}}
{"run":22,"commit":"159fa82","metric":8812,"metrics":{"build_ms":7786,"run_ms":1025,"image_bytes":637534208},"status":"discard","description":"Steady-state sparse-dd image assembly did not beat the current best; preserving holes in the final GPT image helped run_ms somewhat but still landed slightly above the targeted-chmod baseline.","timestamp":1776304786562,"segment":4,"confidence":2.0803504847129006,"iterationTokens":990,"asi":{"hypothesis":"If sparse final-image assembly was a real win, the rerun after rebuilding the disk image once would beat 8659ms.","rollback_reason":"Second-pass total_ms was 8812ms, still worse than the current best 8659ms, so this variant is not worth keeping.","next_action_hint":"Keep the simpler non-sparse disk assembly and look for higher-ROI wins elsewhere.","result":"build_ms=7786 and run_ms=1025 were both respectable, but not enough to beat the best total.","observed_tradeoff":"Sparse final-image assembly narrows the gap but does not outperform the current 608MB + fallocate + targeted-chmod combination."}}
{"run":23,"commit":"159fa82","metric":20501,"metrics":{"build_ms":19346,"run_ms":1154,"image_bytes":637534208},"status":"discard","description":"First `extraPkgs = {}` pass for `functionalSmokeTestSystem` built cleanly but, on the initial rebuild of the smoke outputs, measured worse than the current best.","timestamp":1776305095055,"segment":4,"confidence":3.002152273338714,"iterationTokens":4159,"asi":{"hypothesis":"The smoke test only uses core packages from the flat package set, so dropping the large `extraPkgs` attrset from `functionalSmokeTestSystem` should cut flake eval/build graph overhead.","rollback_reason":"Primary metric on the first run was still worse than the best 8659ms, so this needs a steady-state rerun before keeping.","next_action_hint":"Reapply the `extraPkgs = {}` change and rerun once; if the second pass beats 8659ms, keep it.","result":"Candidate preserved image_bytes but first-run build_ms remained rebuild-dominated.","key_design_choice":"Let the smoke system depend only on the flat package set instead of threading the full extra package overlay through mkSystem."}}
{"run":24,"commit":"9042d4d","metric":8194,"metrics":{"build_ms":7177,"run_ms":1016,"image_bytes":637534208},"status":"keep","description":"Keep `extraPkgs = {}` for `functionalSmokeTestSystem`: the smoke image only needs the flat package set, and dropping the large extra overlay lowers steady-state total_ms from 8659 to 8194.","timestamp":1776305121662,"segment":4,"confidence":2.1670395227442207,"iterationTokens":977,"asi":{"hypothesis":"The first no-extraPkgs run was rebuild-noisy; a steady-state rerun would show whether trimming the smoke system’s package graph reduces eval/build overhead.","result":"Improved total_ms to 8194 with build_ms=7177 and run_ms=1016.","validation":"Smoke suite still passed 18/18 with unchanged image_bytes and package contents needed by the smoke profile.","key_design_choice":"Keep the smoke test isolated from the large `extraPkgs` overlay; rely only on the flat package set already present in `mkSystem`.","next_action_hint":"Next likely ROI is reducing remaining eval/store traversal around the benchmark package, or probing whether the smoke runner can use a lighter VM config without hurting boot/test stability."}}
{"run":25,"commit":"9042d4d","metric":8345,"metrics":{"build_ms":7293,"run_ms":1051,"image_bytes":637534208},"status":"discard","description":"Lowering smoke VM resources to 512MB / 1 vCPU slightly regressed the benchmark; the smaller VM did not offset the slower boot/test path.","timestamp":1776305154822,"segment":4,"confidence":2.1192342752962627,"iterationTokens":1355,"asi":{"hypothesis":"A smaller VM for the smoke suite might reduce launch overhead enough to beat the current 1024MB / 2 vCPU config.","rollback_reason":"Primary metric regressed from 8194ms to 8345ms, with both build_ms and run_ms slightly worse.","next_action_hint":"Keep the 1024MB / 2 vCPU smoke VM and focus on build-graph or image-assembly changes instead.","result":"The lighter VM was not faster for this workload.","observed_tradeoff":"Reducing VM resources increased run_ms enough to outweigh any launch savings."}}
{"run":26,"commit":"9042d4d","metric":18256,"metrics":{"build_ms":17232,"run_ms":1023,"image_bytes":629145600},"status":"discard","description":"First 600MB / 56MB-ESP pass built and booted, trimming the image a bit further, but the initial measured total_ms stayed above the current best.","timestamp":1776305319889,"segment":4,"confidence":2.1670395227442207,"iterationTokens":8038,"asi":{"hypothesis":"If 64MB ESP is still oversized, dropping to 56MB and a 600MB total image should shave a little more copy/build cost while preserving the same smoke workload.","rollback_reason":"Primary metric on the first run was still worse than the best 8194ms, so this needs a steady-state rerun before keeping.","next_action_hint":"Reapply the 600/56 sizing and rerun once; if the second pass beats 8194ms, keep it.","result":"image_bytes fell to 629145600 and run_ms improved to 1023ms, but first-run build noise dominated total_ms.","key_design_choice":"Trim both total image and ESP cautiously while staying above the observed boot artifact footprint."}}
{"run":27,"commit":"9042d4d","metric":8412,"metrics":{"build_ms":7398,"run_ms":1013,"image_bytes":629145600},"status":"discard","description":"Steady-state 600MB / 56MB-ESP sizing still missed the current best; the slightly smaller image improved run_ms but not enough to beat the 608MB / 64MB configuration.","timestamp":1776305345626,"segment":4,"confidence":2.1192342752962627,"iterationTokens":1017,"asi":{"hypothesis":"If 600/56 were better than 608/64, the rerun after rebuilding once would beat 8194ms.","rollback_reason":"Second-pass total_ms was 8412ms, still above the best 8194ms, so this extra size cut is not worth keeping.","next_action_hint":"Stick with 608/64 and look for non-sizing wins; smaller disk tweaks are now in diminishing-returns territory.","result":"image_bytes dropped to 629145600 and run_ms to 1013ms, but build_ms remained worse than the best configuration.","observed_tradeoff":"ESP/disk size tweaks below 608/64 reduce bytes but no longer improve total benchmark time."}}
{"run":28,"commit":"9042d4d","metric":8441,"metrics":{"build_ms":7408,"run_ms":1032,"image_bytes":637534208},"status":"discard","description":"Building only `.#functionalSmokeTest` and discovering the disk image via `nix path-info -r` was slightly slower than building the runner and image together.","timestamp":1776305470687,"segment":4,"confidence":3.3697637338744744,"iterationTokens":1017,"asi":{"hypothesis":"Dropping the second top-level `nix build` target would reduce eval and closure-traversal overhead because the runner already depends on the smoke disk image.","rollback_reason":"Primary metric regressed from 8194ms to 8441ms on a steady-state script-only change, so the extra `nix path-info -r` walk costs more than the second installable saves.","next_action_hint":"Avoid extra closure walks in the harness; higher ROI is likely inside the flake output graph or image build path, not shell-level target selection.","result":"No-op benchmark semantics preserved, but build_ms worsened to 7408ms.","observed_tradeoff":"One build target plus one recursive path-info scan lost to the two-target direct build."}}
{"run":29,"commit":"9ce18e8","metric":8112,"metrics":{"build_ms":7082,"run_ms":1029,"image_bytes":637534208},"status":"keep","description":"Keep the Cloud-Hypervisor-only smoke runner path: parameterized `mkVmTest` / `mkFunctionalTest` to disable unused VMM backends, and `functionalSmokeTest` now emits a CH-only runner without QEMU/OVMF baggage, lowering total_ms from 8194 to 8112.","timestamp":1776305694712,"segment":4,"confidence":11.788519637462235,"iterationTokens":15917,"asi":{"hypothesis":"The smoke benchmark runs only on KVM/Cloud Hypervisor here, so omitting the unused QEMU backend from the smoke runner closure should reduce package-graph and closure-traversal overhead.","result":"Improved total_ms to 8112 with build_ms=7082 and unchanged image_bytes.","validation":"Smoke suite still passed 18/18; general functional-test runners still keep both backends, while smoke runner explicitly uses `defaultMode = \"ch\"` and `enableQemu = false`.","key_design_choice":"Make VMM backend inclusion explicit in `mkVmTest` instead of always embedding both launchers into every runner script.","next_action_hint":"Re-measure closure size and look for the next removable runner dependency, or prune stale ideas and try a deeper build-graph reduction if remaining gains are now sub-100ms."}}
{"run":30,"commit":"9ce18e8","metric":0,"metrics":{"build_ms":0,"run_ms":0,"image_bytes":0},"status":"crash","description":"Canonicalizing GitLab URLs to add `.git` crashed immediately: flake-style `gitlab:` inputs treat `.git` as part of the project path, so `object.git` fetched a nonexistent project.","timestamp":1776305792039,"segment":4,"confidence":11.788519637462235,"iterationTokens":5068,"asi":{"hypothesis":"Eliminating the repeated GitLab redirect warnings by switching URLs to their canonical `.git` forms might cut eval/build overhead.","rollback_reason":"`gitlab:` flake input syntax does not accept the `.git` suffix as a harmless alias; it changed the project name and broke fetch with HTTP 404 before the benchmark started.","next_action_hint":"If warning cleanup still looks worthwhile, only adjust plain HTTPS/git fetch URLs, not `gitlab:` flake input shorthands.","failure_detail":"Fetch failed for `gitlab:andypython/object.git/master?host=gitlab.redox-os.org` with `404 Project Not Found`.","learned_scope":"Need to split flake-input URL handling from raw git URL handling; they are not interchangeable."}}
{"run":31,"commit":"9ce18e8","metric":8176,"metrics":{"build_ms":7130,"run_ms":1046,"image_bytes":637534208},"status":"discard","description":"Preferring `/dev/shm` for the VM work dir did not beat the current best; tmpfs staging was effectively a wash for this smoke workload.","timestamp":1776305853261,"segment":4,"confidence":12.717001629549157,"iterationTokens":1738,"asi":{"hypothesis":"Creating the VM work dir on `/dev/shm` when available would shave image-copy and runner I/O overhead without changing semantics.","rollback_reason":"Primary metric regressed slightly from 8112ms to 8176ms on a steady-state runner-only change, so the tmpfs preference is not worth keeping.","next_action_hint":"Leave work-dir placement alone; remaining gains likely need build-graph trimming rather than filesystem staging tweaks.","result":"No benchmark win despite using tmpfs staging.","observed_tradeoff":"build_ms changed only marginally and run_ms actually worsened a bit, so the current disk-backed temp dir is already good enough here."}}
{"run":32,"commit":"14d9857","metric":7891,"metrics":{"build_ms":6853,"run_ms":1037,"image_bytes":637534208},"status":"keep","description":"Keep flake input pruning: removed unused `redox-liner-src` from `flake.nix`/`flake.lock`, which trims steady-state smoke total_ms from 8112 to 7891.","timestamp":1776305993541,"segment":4,"confidence":13.077850877192983,"iterationTokens":4070,"asi":{"hypothesis":"Even unused flake inputs can cost eval/fetch overhead on every benchmark run, so removing the unreferenced `redox-liner-src` input should reduce build_ms.","result":"Improved total_ms to 7891 with build_ms=6853 and unchanged image_bytes.","validation":"Smoke suite still passed 18/18; search confirmed `redox-liner-src` had no code references outside lock/examples before removal.","key_design_choice":"Treat unused flake inputs as benchmark-visible dependency graph bloat and prune them instead of trying to canonicalize their redirecting URLs.","next_action_hint":"Look for other unused or smoke-irrelevant flake inputs/overlay edges that still fetch or evaluate on every run, and prune them carefully."}}
{"run":33,"commit":"14d9857","metric":79912,"metrics":{"build_ms":78895,"run_ms":1016,"image_bytes":637534208},"status":"discard","description":"First raw-git URL canonicalization pass rebuilt large parts of the ion/relibc dependency graph, so the initial benchmark was dominated by one-time package rebuild cost.","timestamp":1776306173923,"segment":4,"confidence":11.220131702728128,"iterationTokens":3674,"asi":{"hypothesis":"Adding `.git` to the raw GitLab fetch URLs for `liner`, `calc`, `small`, and relibc's `object` source will remove redirect overhead on steady-state smoke builds.","rollback_reason":"Primary metric exploded on the first run because changing the source fetch URLs forced a large rebuild, so this pass cannot be judged without a steady-state rerun.","next_action_hint":"Reapply `/tmp/redox-git-url-dotgit.patch` and rerun once; if the second pass beats 7891ms and the redirect warnings drop, keep it.","result":"Smoke suite still passed and run_ms stayed normal, so the regression was build-graph churn rather than runtime breakage.","saved_patch":"/tmp/redox-git-url-dotgit.patch","observed_tradeoff":"Source URL normalization may still help steady state, but its first-run cost is very high."}}
{"run":34,"commit":"14d9857","metric":7966,"metrics":{"build_ms":6953,"run_ms":1012,"image_bytes":637534208},"status":"discard","description":"Steady-state raw-git URL `.git` normalization did not help; redirect warnings were unchanged and total_ms still landed slightly above the current best.","timestamp":1776306212060,"segment":4,"confidence":11.273156899810964,"iterationTokens":1137,"asi":{"hypothesis":"If canonical raw Git URLs mattered, the rerun after one-time rebuild cost would beat 7891ms and reduce the warning spam.","rollback_reason":"Second-pass total_ms was 7966ms, still worse than the best 7891ms, and the same four redirect warnings remained.","next_action_hint":"Drop the URL-canonicalization path entirely; the warnings are not coming from these raw fetch URLs in a way that matters to this benchmark.","result":"No steady-state win; warning source likely lies elsewhere (for example flake inputs or fetcher internals).","observed_tradeoff":"Expensive first-run rebuild plus no warning reduction makes this path stale."}}
{"run":35,"commit":"14d9857","metric":8008,"metrics":{"build_ms":6976,"run_ms":1031,"image_bytes":637534208},"status":"discard","description":"First `tokei-src` top-level input removal rebuilt no smoke artifacts but did pay the one-time flake.lock update cost, leaving the initial run slightly above the current best.","timestamp":1776306349171,"segment":4,"confidence":12.423958333333333,"iterationTokens":7200,"asi":{"hypothesis":"Moving unused-on-benchmark package sources like `tokei-src` out of top-level flake inputs and into package-local fetchers should shrink flake evaluation overhead without affecting the smoke workflow.","rollback_reason":"Primary metric on the first run was still above the best 7891ms, and the run included a one-time lock-file removal update, so it is not enough evidence to keep.","next_action_hint":"Reapply `/tmp/redox-prune-tokei.patch` and rerun once; if steady state drops below 7891ms, keep it and consider the same treatment for similar GitHub-only tool inputs.","saved_patch":"/tmp/redox-prune-tokei.patch","result":"Smoke semantics unchanged; only top-level input plumbing changed.","observed_tradeoff":"The idea is still plausible, but first-run lock maintenance obscures its real steady-state cost."}}
{"run":36,"commit":"ae46ecf","metric":7335,"metrics":{"build_ms":6480,"run_ms":854,"image_bytes":637534208},"status":"keep","description":"Keep `tokei-src` pruning: moved `tokei` to a package-local `fetchFromGitHub` and removed the top-level `tokei-src` flake input, dropping steady-state total_ms from 7891 to 7335.","timestamp":1776306378848,"segment":4,"confidence":13.80862831858407,"iterationTokens":1318,"asi":{"hypothesis":"The first `tokei-src` removal run was lock-update noise; in steady state, shrinking the top-level flake input graph by moving smoke-irrelevant package sources local should reduce build_ms.","result":"Improved total_ms to 7335 with build_ms=6480 and run_ms=854.","validation":"Smoke suite still passed 18/18 with unchanged image size and no smoke-package behavior changes.","key_design_choice":"Keep smoke-irrelevant source fetches out of top-level flake inputs when they are only needed by one package definition.","next_action_hint":"Try the same treatment on the next unrelated top-level GitHub source input such as `lsd-src` or `shellharden-src`; this looks like a real class of wins, not a one-off."}}
{"run":37,"commit":"895a66e","metric":7333,"metrics":{"build_ms":6465,"run_ms":867,"image_bytes":637534208},"status":"keep","description":"Keep `lsd-src` pruning too: moved `lsd` to a package-local `fetchFromGitHub` and removed the top-level `lsd-src` flake input, yielding a small further drop from 7335 to 7333.","timestamp":1776306436472,"segment":4,"confidence":13.682191780821919,"iterationTokens":1524,"asi":{"hypothesis":"The same top-level input pruning that helped `tokei-src` should also help another smoke-irrelevant GitHub package input like `lsd-src`.","result":"Marginally improved total_ms to 7333 with build_ms=6465.","validation":"Smoke suite still passed 18/18; only unrelated package source plumbing changed.","key_design_choice":"Continue shrinking the top-level flake input graph by localizing package-only fetches.","next_action_hint":"Rerun once to see whether this 2ms gain is real or noise, then either keep pruning similar inputs or stop if the class is saturated."}}
{"run":38,"commit":"895a66e","metric":7588,"metrics":{"build_ms":6728,"run_ms":860,"image_bytes":637534208},"status":"discard","description":"Noise check after the `lsd-src` pruning keep: unchanged code reran slower, so the extra 2ms gain is within normal noise even though the broader input-pruning class still looks useful.","timestamp":1776306465849,"segment":4,"confidence":13.555917480998914,"iterationTokens":1405,"asi":{"hypothesis":"Repeat the unchanged `lsd-src`-pruned benchmark once to estimate whether the tiny 2ms win was real.","rollback_reason":"No code changes and worse total_ms than the current best; this rerun only measures noise.","next_action_hint":"Treat `lsd-src` pruning as at best neutral-to-small, and continue only with bigger input-pruning candidates or more structural wins.","observed_noise":"Steady-state rerun moved from 7333ms to 7588ms with no code changes; noise at this scale exceeds the measured 2ms gain.","result":"Useful noise measurement only."}}
{"run":39,"commit":"895a66e","metric":7519,"metrics":{"build_ms":6657,"run_ms":861,"image_bytes":637534208},"status":"discard","description":"First `shellharden-src` top-level input removal included the one-time lock update, so the initial result stayed above the current best.","timestamp":1776306526493,"segment":4,"confidence":12.282341367437285,"iterationTokens":1682,"asi":{"hypothesis":"Localizing another smoke-irrelevant GitHub tool source (`shellharden-src`) should continue shrinking top-level flake input overhead.","rollback_reason":"Primary metric on the first run was still above the best 7333ms, and the run paid the one-time lock-file removal cost, so it cannot be judged yet.","next_action_hint":"Reapply `/tmp/redox-prune-shellharden.patch` and rerun once; if steady state beats 7333ms, keep it.","saved_patch":"/tmp/redox-prune-shellharden.patch","result":"Smoke semantics unchanged; only package-source plumbing moved local.","observed_tradeoff":"Lock maintenance still obscures the first pass for this input-pruning class."}}
{"run":40,"commit":"895a66e","metric":7586,"metrics":{"build_ms":6726,"run_ms":859,"image_bytes":637534208},"status":"discard","description":"Steady-state `shellharden-src` pruning did not help; localizing that input left the benchmark above the current best.","timestamp":1776306553287,"segment":4,"confidence":11.227517985611511,"iterationTokens":1186,"asi":{"hypothesis":"If `shellharden-src` mattered like `tokei-src`, the rerun after lock maintenance would beat 7333ms.","rollback_reason":"Second-pass total_ms was 7586ms, still above the best 7333ms, so this extra input pruning is not worth keeping.","next_action_hint":"Treat `tokei-src` as the clear winner from this class for now; future pruning should target inputs with bigger per-run overhead or clearer smoke irrelevance.","result":"No steady-state win from removing `shellharden-src` as a top-level input.","observed_tradeoff":"Not every top-level input carries enough repeated overhead to justify localizing it."}}
{"run":41,"commit":"895a66e","metric":7596,"metrics":{"build_ms":6740,"run_ms":855,"image_bytes":637534208},"status":"discard","description":"Removing the unused top-level `object-src` input did not look promising even on the first pass; the same redirect warning remained and total_ms stayed well above the current best.","timestamp":1776306660683,"segment":4,"confidence":11.480459770114942,"iterationTokens":3788,"asi":{"hypothesis":"If `object-src` was unused top-level input bloat like `redox-liner-src`, pruning it should reduce flake input overhead.","rollback_reason":"Primary metric stayed far above the best 7333ms and, unlike the winning `tokei-src` pruning, the object redirect warning remained unchanged, weakening the case for a useful steady-state win.","next_action_hint":"Drop the `object-src` pruning path; the remaining object warning is coming from some other fetch path, so removing this input alone is stale.","result":"No sign that this unused input removal meaningfully helps the benchmark.","observed_tradeoff":"Lock-file churn without warning reduction makes this candidate low-ROI compared with proven wins."}}
{"run":42,"commit":"895a66e","metric":7626,"metrics":{"build_ms":6757,"run_ms":869,"image_bytes":637534208},"status":"discard","description":"First `exampled-src` pruning pass paid the one-time lock update cost and still landed above the current best, so it needs a steady-state rerun before judgment.","timestamp":1776306759720,"segment":4,"confidence":11.745061147695202,"iterationTokens":3557,"asi":{"hypothesis":"Another smoke-irrelevant top-level package source, `exampled-src`, might behave like `tokei-src` if moved into a package-local fetch.","rollback_reason":"Primary metric on the first run was still above the best 7333ms, and the run included one-time lock maintenance.","next_action_hint":"Reapply `/tmp/redox-prune-exampled.patch` and rerun once; if steady state beats 7333ms, keep it.","saved_patch":"/tmp/redox-prune-exampled.patch","result":"Smoke semantics unchanged; only `exampled` source plumbing moved local.","observed_tradeoff":"As with other input-pruning attempts, first-run lock churn obscures steady-state value."}}
{"run":43,"commit":"895a66e","metric":7763,"metrics":{"build_ms":6895,"run_ms":867,"image_bytes":637534208},"status":"discard","description":"Steady-state `exampled-src` pruning did not help; localizing that input still left the smoke benchmark well above the current best.","timestamp":1776306794766,"segment":4,"confidence":13.296059637912673,"iterationTokens":1174,"asi":{"hypothesis":"If `exampled-src` mattered like `tokei-src`, the rerun after lock maintenance would beat 7333ms.","rollback_reason":"Second-pass total_ms was 7763ms, still above the best 7333ms, so this input-pruning candidate is not worth keeping.","next_action_hint":"Stop random package-input pruning and focus only on candidates with clearer smoke-path reach or larger dependency-graph impact.","result":"No steady-state win from removing `exampled-src` as a top-level flake input.","observed_tradeoff":"The `tokei-src` win does not generalize automatically to unrelated package inputs."}}
{"run":44,"commit":"895a66e","metric":8740,"metrics":{"build_ms":7610,"run_ms":1128,"image_bytes":637534208},"status":"discard","description":"Adding runner-side `--print-image-path/--print-image-bytes` hooks and using them from `autoresearch.sh` regressed badly; shelling into the large runner script for metadata was slower than the old `nix path-info -r` path.","timestamp":1776307216263,"segment":4,"confidence":12.086156824782188,"iterationTokens":815,"asi":{"hypothesis":"Expose disk-image metadata directly from the VM runner so the harness can stop paying `nix path-info -r` closure-walk cost.","rollback_reason":"Two steady-state runs landed at 8676ms and 8740ms, far above the current best 7333ms, so invoking the generated runner script for metadata is a losing strategy.","next_action_hint":"If revisiting this class, emit static metadata files during derivation build instead of executing the runner script at benchmark time; otherwise move on to other graph/build reductions.","saved_patch":"/tmp/redox-runner-image-query.patch","result":"Smoke semantics unchanged, but build_ms rose sharply to ~7.6s.","observed_tradeoff":"A general-purpose CLI hook is nicer ergonomically, yet startup cost of the large shell runner dominates any saved closure query time."}}
{"run":45,"commit":"895a66e","metric":7808,"metrics":{"build_ms":6749,"run_ms":1058,"image_bytes":637534208},"status":"discard","description":"Reverting the harness to direct two-target `nix build .#functionalSmokeTest .#redox-functional-smoke-test` stayed slower than the current single-target-plus-query path on today's tree.","timestamp":1776307308877,"segment":4,"confidence":14.593804792518995,"iterationTokens":570,"asi":{"hypothesis":"Now that flake-input pruning and CH-only runner changes landed, direct top-level builds of both smoke outputs might beat the current single-target harness again.","rollback_reason":"Two runs landed at 8198ms and 7808ms, both still above the current best 7333ms, so switching back to the two-target harness is not a win.","next_action_hint":"Keep the current harness shape and look for lower-level graph/build reductions instead of toggling target selection again.","saved_patch":"/tmp/redox-two-target-build.patch","result":"Same smoke image and tests; only host build selection changed.","observed_tradeoff":"Directly requesting the disk-image output still costs more than discovering it through the current harness path on this tree."}}
{"run":46,"commit":"b3a7fca","metric":1264,"metrics":{"build_ms":208,"run_ms":1055,"image_bytes":637534208},"status":"keep","description":"Keep smoke-only package-graph trimming: `functionalSmokeTestSystem` now uses a minimal explicit `pkgs` set instead of the full flat package graph, collapsing cached smoke total_ms from 7333 to 1264 after warm-up.","timestamp":1776307649971,"segment":4,"confidence":22.76564417177914,"iterationTokens":1517,"asi":{"hypothesis":"The smoke image only needs a handful of packages; bypassing the full `mkFlatPkgs` graph for `functionalSmokeTestSystem` should stop Nix from touching lots of unrelated package/input edges on cached benchmark runs.","result":"After the one-time graph rebuild (16976ms) and first cached warm-up pass (7482ms), steady-state runs dropped to 1222ms and 1264ms with build_ms around 0.2s.","validation":"Smoke image bytes stayed 637534208 and the same 18/18 smoke tests still passed to completion under Cloud Hypervisor.","key_design_choice":"Construct a smoke-specific `pkgs` attrset with only `redoxfs`, `bootloader`, `bootloaderAutoboot`, `redoxfsTarget`, `bootstrap`, `initfsTools`, `kernel`, `kernelSyscallDebug`, `base`, `ion`, and `uutils`, then feed that directly to `redoxSystemFactory.redoxSystem`.","why_it_helps":"This avoids evaluating or chasing large unrelated userspace/infrastructure package sets for the smoke benchmark, eliminating the repeated redirect-warning/eval overhead that dominated cached build_ms.","next_action_hint":"Check whether the new lean package set can be generalized safely to other focused profiles without hiding required package references."}}
{"run":47,"commit":"b3a7fca","metric":7678,"metrics":{"build_ms":6625,"run_ms":1052,"image_bytes":637534208},"status":"discard","description":"Canonicalizing relibc's `object` git dependency at the Cargo.toml/Cargo.lock source level removed the `andypython/object` redirect warning, but by itself it did not beat the current benchmark.","timestamp":1776308374041,"segment":4,"confidence":23.956100710135573,"iterationTokens":4278,"asi":{"hypothesis":"The warning-heavy cached runs come from source-level git dependency redirects, so patching relibc's `object` URL to the canonical `.git` form in both Cargo metadata and cargo source mapping should trim first-run build_ms.","rollback_reason":"This removed one warning line but the steady warning-heavy run still landed at 7678ms, above the current best and only modestly better than nearby baseline warm-up runs.","next_action_hint":"If continuing this class, patch ion's source-level git deps (`liner`, `calc`, `small`) the same way; relibc-only canonicalization is too small to justify alone.","saved_patch":"/tmp/redox-relibc-object-git.patch","result":"`andypython/object` redirect warning disappeared; `liner`, `calc`, and `small` warnings remained.","observed_tradeoff":"Source-level canonicalization seems to attack the right mechanism, but one of four warnings is not enough for a clear primary-metric win."}}
{"type":"config","name":"Redox iteration speed: smoke benchmark snapshot excluding autoresearch dirtiness","metricName":"total_ms","metricUnit":"ms","bestDirection":"lower"}
{"run":48,"commit":"d3c4dbe","metric":8145,"metrics":{"build_ms":7051,"run_ms":1093,"image_bytes":637534208},"status":"keep","description":"Revert the false smoke-only `pkgs` trim from `functionalSmokeTestSystem`: the `smokePkgs` override in `nix/flake-modules/system.nix` was the only code change in `b3a7fca5`, and clean-worktree validation showed it regressed the new clean-snapshot benchmark badly.","timestamp":1776309311016,"segment":5,"confidence":null,"iterationTokens":3146,"asi":{"hypothesis":"Backing out the `smokePkgs` override and restoring `functionalSmokeTestSystem = mkSystem { ...; extraPkgs = { }; }` should recover the fast clean-snapshot benchmark because `b3a7fca5` turned a ~1.3s clean run into a ~10.3s clean run.","result":"Dirty-patch measurement improved the new segment baseline from 10949 to 8145 with build_ms=7051.","validation":"Detached clean worktree at `895a66e3` runs `./autoresearch.sh` in about 1315ms total, while detached clean worktree at `b3a7fca5` took about 10297ms; `git diff 895a66e3..b3a7fca5` shows `nix/flake-modules/system.nix` was the only product-code change.","key_design_choice":"Treat prior warm-cache-only gains as invalid and restore the last clean product-code state until a change proves itself under the cleaned benchmark harness.","next_action_hint":"Now that the branch is back to the fast clean state, attack remaining first-run redirect/warning overhead from source-level git dependency URLs, especially ion's `liner`/`calc`/`small` deps."}}
{"type":"config","name":"Redox iteration speed: stable snapshot smoke benchmark excluding autoresearch dirtiness","metricName":"total_ms","metricUnit":"ms","bestDirection":"lower"}
{"run":49,"commit":"d3c4dbe","metric":1321,"metrics":{"build_ms":224,"run_ms":1097,"image_bytes":637534208},"status":"discard","description":"Baseline run for the stable snapshot harness: reusing a persistent clean worktree snapshot removes autoresearch-file contamination and shows the real cached smoke benchmark is about 1.3s on the current code.","timestamp":1776309445898,"segment":6,"confidence":null,"iterationTokens":121,"asi":{"hypothesis":"A persistent snapshot worktree should preserve Nix eval caching while excluding autoresearch-file dirtiness, unlike the one-shot temp worktree path that forced ~7-8s reevaluation every run.","rollback_reason":"No product-code change in this run; this is baseline/benchmark-validation data only.","next_action_hint":"Now chase sub-100ms build_ms wins or remaining redirect-warning overhead under the stable harness instead of dirty-tree artifacts.","result":"Measured stable baseline at total_ms=1321 with build_ms=224 and run_ms=1097 on current HEAD `d3c4dbe`.","validation":"Two direct shell runs before run_experiment were consistent at 1407ms and 1360ms; warning spam disappeared once the persistent snapshot path was reused.","benchmark_fix":"Persistent snapshot path is required; recreating a fresh temp worktree each run invalidated the benchmark by forcing flake reevaluation."}}
{"run":50,"commit":"d3c4dbe","metric":8007,"metrics":{"build_ms":7198,"run_ms":809,"image_bytes":637534208},"status":"discard","description":"Cloud Hypervisor qcow2 overlay path slashed VM run_ms, but under the current edit-loop benchmark the added runner change still did not beat the current segment baseline.","timestamp":1776310157259,"segment":6,"confidence":null,"iterationTokens":28769,"asi":{"hypothesis":"Replace the CH runner's 605MiB raw-image copy with a tiny qcow2 overlay backed by the immutable store image, which should cut run_ms materially while preserving exact boot/test semantics.","rollback_reason":"Total_ms stayed far above the current segment baseline, so the qcow2 overlay path is not a clear overall win in this benchmark form even though run_ms improved.","next_action_hint":"If revisiting, compare against a no-op dirty control in the same file or pair it with build-phase reductions; otherwise focus on changes that reduce the dominant dirty build cost.","result":"run_ms dropped to 809ms, but build_ms remained about 7.2s and dominated total_ms.","observed_tradeoff":"This looks like a genuine runtime optimization hidden by dirty-tree build overhead, not a balanced end-to-end win yet."}}
{"type":"config","name":"Redox iteration speed: dirty-tree smoke benchmark excluding autoresearch files","metricName":"total_ms","metricUnit":"ms","bestDirection":"lower"}
{"run":51,"commit":"d3c4dbe","metric":8580,"metrics":{"build_ms":7505,"run_ms":1074,"image_bytes":637534208},"status":"discard","description":"Dirty-tree control for `nix/pkgs/default.nix`: a comment-only edit in the ion package definition shows the current no-op cost of touching this file under the edit-loop benchmark.","timestamp":1776310215552,"segment":7,"confidence":null,"iterationTokens":297,"asi":{"hypothesis":"Before changing ion's source mappings, measure the dirty-tree baseline cost of touching `nix/pkgs/default.nix` with no semantic change.","rollback_reason":"Comment-only control; no semantic improvement to keep.","next_action_hint":"Apply the real ion git-URL canonicalization in the same file and compare against this 8580ms control, not against the clean-tree baseline.","result":"Control run landed at total_ms=8580 with build_ms=7505.","control_use":"Use as dirty-tree reference for experiments that modify `nix/pkgs/default.nix`."}}
{"run":52,"commit":"d3c4dbe","metric":8390,"metrics":{"build_ms":7307,"run_ms":1082,"image_bytes":637534208},"status":"discard","description":"Ion source-level `.git` canonicalization in `nix/pkgs/default.nix` did not change the four redirect warnings and only nudged the dirty-tree metric within noise versus the 8580ms control.","timestamp":1776310287694,"segment":7,"confidence":null,"iterationTokens":2939,"asi":{"hypothesis":"Patching ion's `Cargo.toml`/`Cargo.lock` git URLs and matching `gitSources` to canonical `.git` forms would remove the `liner`/`calc`/`small` redirect overhead in dirty builds.","rollback_reason":"Redirect warnings were unchanged and the 8390ms result is only a small shift from the 8580ms comment-only control in the same file, so there is no clear causal win.","next_action_hint":"Stop pursuing ion URL canonicalization through `nix/pkgs/default.nix`; the warning source is elsewhere in the dirty eval path.","result":"No observable warning reduction; total_ms improved only 190ms against control.","control_reference":"run 51 dirty-tree control for `nix/pkgs/default.nix` was 8580ms with the same benchmark harness."}}
{"run":53,"commit":"0da6d9f","metric":7483,"metrics":{"build_ms":6449,"run_ms":1033,"image_bytes":637534208},"status":"keep","description":"Keep GitLab URL canonicalization where it actually matters: patch `ion-build-plan.json` to use `.git` for `liner`/`calc`/`small`, and update relibc's object source mapping to `.git`, cutting the dirty-tree smoke benchmark from the 8580ms control to 7483ms.","timestamp":1776310463545,"segment":7,"confidence":5.773684210526316,"iterationTokens":11179,"asi":{"hypothesis":"The dirty build warnings are driven by unit2nix/build-plan git source URLs, not the legacy `mkUserspace` ion package path, so canonicalizing the ion build plan plus relibc's object mapping should remove redirect overhead from the real smoke path.","result":"Second run dropped to total_ms=7483 with build_ms=6449; warning output shrank from four redirects to just the remaining `andypython/object.git` line.","validation":"First pass paid one-time remote fetch cost for the new canonical `liner.git`/`calc.git`/`small.git` URLs, but the second pass stayed green 18/18 with unchanged image size and only one warning left.","key_design_choice":"Patch the actual smoke-path metadata (`nix/pkgs/userspace/ion-build-plan.json`) instead of the unused legacy ion package definition in `nix/pkgs/default.nix`.","next_action_hint":"Apply the source-level relibc object canonicalization too so the last `andypython/object.git` warning disappears, then rerun to see if dirty build_ms drops further."}}
{"run":54,"commit":"0da6d9f","metric":80439,"metrics":{"build_ms":79124,"run_ms":1314,"image_bytes":637534208},"status":"discard","description":"First relibc source-level object canonicalization pass paid a huge one-time rebuild/fetch cost, so this run cannot judge the steady-state value of removing the last redirect warning.","timestamp":1776310602068,"segment":7,"confidence":2,"iterationTokens":3257,"asi":{"hypothesis":"Patching relibc's own `Cargo.toml`/`Cargo.lock` object URL to `.git`, on top of the kept source-mapping fix, should remove the final `andypython/object.git` warning and trim dirty build_ms further.","rollback_reason":"Primary metric was dominated by one-time rebuild cost (~79s build_ms), so this pass is unusable as a keep/discard signal.","next_action_hint":"Reapply `/tmp/redox-relibc-object-source.patch` and rerun once; if the second pass removes the last warning and beats 7483ms, keep it.","saved_patch":"/tmp/redox-relibc-object-source.patch","result":"Smoke suite still passed; regression came from rebuild churn, not runtime behavior.","observed_tradeoff":"Source-level canonicalization may still help steady state, but changing relibc's patched source invalidates much more cached work than the ion build-plan edit did."}}
{"run":55,"commit":"0c2e1ff","metric":7233,"metrics":{"build_ms":5374,"run_ms":1859,"image_bytes":637534208},"status":"keep","description":"Keep the final relibc object canonicalization: patching relibc's source metadata to `.git` removed the last redirect warning and dropped the dirty-tree smoke benchmark from 7483 to 7233.","timestamp":1776310653696,"segment":7,"confidence":1.4851157662624035,"iterationTokens":1124,"asi":{"hypothesis":"Once the one-time relibc source rebuild is out of the way, canonicalizing relibc's own `Cargo.toml`/`Cargo.lock` object URL to `.git` should remove the last `andypython/object.git` warning and trim dirty build_ms further.","result":"Second run removed all redirect warnings and improved total_ms to 7233 with build_ms=5374.","validation":"Smoke suite still passed 18/18 with unchanged image size; log start no longer shows any redirect warnings.","key_design_choice":"Canonicalize the actual source metadata for relibc, not just the cargo source mapping, because that final warning persisted until both layers matched.","observed_tradeoff":"run_ms was noisier on this pass, but the build_ms reduction was large enough to outweigh it by over 1.2s total.","next_action_hint":"Prune URL-warning ideas from the backlog and look for the next dirty-build hotspot now that the warning-heavy GitLab redirects are gone."}}
{"run":56,"commit":"0c2e1ff","metric":6552,"metrics":{"build_ms":5318,"run_ms":1233,"image_bytes":637534208},"status":"discard","description":"Validation rerun of the fully canonicalized GitLab metadata: unchanged code came in faster at 6552ms, confirming the relibc+ion warning cleanup is real and that the previous keep's run_ms was a noisy outlier.","timestamp":1776310697665,"segment":7,"confidence":2,"iterationTokens":1358,"asi":{"hypothesis":"Rerunning the unchanged fully canonicalized tree should confirm whether the 7233ms keep was real or just run_ms noise.","rollback_reason":"No code changes in this run; this is confirmation data only.","next_action_hint":"Treat the warning-cleanup class as finished and update the backlog toward post-warning dirty-build hotspots.","result":"Same code reran at total_ms=6552 with build_ms=5318 and no redirect warnings.","observed_noise":"Previous keep had run_ms=1859; rerun dropped to 1233 with the same build_ms neighborhood, so most remaining variance is runtime noise, not build regression."}}
{"run":57,"commit":"0c2e1ff","metric":6866,"metrics":{"build_ms":5506,"run_ms":1360,"image_bytes":637534208},"status":"discard","description":"First post-warning `object-src` top-level pruning pass included the one-time flake.lock update, so it cannot judge steady-state value yet.","timestamp":1776310837405,"segment":7,"confidence":1.4851157662624035,"iterationTokens":3979,"asi":{"hypothesis":"Now that relibc no longer needs the top-level `object-src` input and the warning class is fixed at the source/build-plan level, removing the unused flake input may shave a little more dirty eval overhead.","rollback_reason":"This first run paid the one-time lock-file removal cost and landed above the current observed best for the warning-cleaned tree, so it is not enough evidence to keep.","next_action_hint":"Reapply `/tmp/redox-prune-object-postwarn.patch` and rerun once; only keep if the steady-state rerun beats the current warning-cleaned runs.","saved_patch":"/tmp/redox-prune-object-postwarn.patch","result":"Smoke semantics unchanged; this was only flake-input plumbing.","observed_tradeoff":"With the warning class already fixed, any remaining gain from unused-input pruning is likely smaller and easier to drown in noise."}}
{"run":58,"commit":"0c2e1ff","metric":6733,"metrics":{"build_ms":5043,"run_ms":1689,"image_bytes":637534208},"status":"discard","description":"Steady-state post-warning `object-src` pruning did not pay off; build_ms improved a bit, but run_ms noise left total_ms above the current warning-cleaned best.","timestamp":1776310875760,"segment":7,"confidence":1.8825995807127882,"iterationTokens":1280,"asi":{"hypothesis":"If the now-unused top-level `object-src` input still carried measurable eval overhead, the rerun after lock maintenance would beat the current warning-cleaned tree.","rollback_reason":"Second-pass total_ms was 6733, still above the current observed best run for the warning-cleaned tree, so this extra flake-input pruning is not worth keeping.","next_action_hint":"Treat the URL-warning cleanup as the big remaining dirty-build win from this family; future work should target other hotspots, not more `object-src` plumbing.","result":"No clear overall win from removing the now-unused top-level `object-src` input.","observed_tradeoff":"build_ms dropped to 5043, but run_ms noise more than erased it at the primary metric level."}}
{"run":59,"commit":"0c2e1ff","metric":7101,"metrics":{"build_ms":5644,"run_ms":1456,"image_bytes":637534208},"status":"discard","description":"Dirty-tree control for `nix/flake-modules/system.nix`: comment-only touch near `mkFlatPkgs` measures the current no-op cost of editing this file under the smoke benchmark.","timestamp":1776311993666,"segment":7,"confidence":2.694,"iterationTokens":1280,"asi":{"hypothesis":"Before changing `mkFlatPkgs`, measure the dirty-tree baseline cost of touching `nix/flake-modules/system.nix` with no semantic change.","rollback_reason":"Comment-only control; no semantic improvement to keep.","next_action_hint":"Compare any `mkFlatPkgs` pruning against this 7101ms control, not just against earlier no-change reruns.","result":"Control run landed at total_ms=7101 with build_ms=5644.","control_use":"Use as dirty-tree reference for `system.nix` eval-path experiments."}}
{"run":60,"commit":"0c2e1ff","metric":7069,"metrics":{"build_ms":5601,"run_ms":1468,"image_bytes":637534208},"status":"discard","description":"Avoiding overridden `kernel`/`base` and `ion`/`userutils` values inside `mkFlatPkgs` did not buy a clear end-to-end win over the `system.nix` dirty-tree control.","timestamp":1776312063991,"segment":7,"confidence":3.592,"iterationTokens":1768,"asi":{"hypothesis":"If `mkFlatPkgs` eagerly evaluates the monolithic `modularPkgs.system` and overridden userspace entries before `//` discards them, selecting only the needed fields should reduce dirty-tree eval cost.","rollback_reason":"Total_ms only moved from the `system.nix` comment-only control 7101 to 7069, far too small and noisy to justify keeping.","next_action_hint":"Try the bigger eval hypothesis: remove the second `redox-env.nix` instantiation by having `system.nix` reuse environment data already computed in `packages.nix`.","result":"Smoke suite still passed, but build_ms only fell 43ms versus control.","control_reference":"run 59 `system.nix` dirty-tree control was 7101ms with build_ms=5644."}}
{"run":61,"commit":"0c2e1ff","metric":0,"metrics":{"build_ms":0,"run_ms":0,"image_bytes":0},"status":"crash","description":"First shared-env attempt crashed immediately because `system.nix` still referenced `inputs.*` later in the file after removing the old local `inputs = self.inputs` binding.","timestamp":1776312126227,"segment":7,"confidence":3.592,"iterationTokens":6232,"asi":{"hypothesis":"If `system.nix` reuses the environment already computed in `packages.nix` via `self'.legacyPackages`, the benchmark should avoid a second `redox-env.nix` / nixpkgs instantiation and cut eval-heavy build_ms.","rollback_reason":"Refactor broke evaluation before the benchmark started: `system.nix` had later `inputs.ripgrep-src` references and needed to keep the local `inputs = self.inputs` binding.","next_action_hint":"Restore the `inputs` binding and rerun the shared-env refactor; the failure was a local wiring bug, not evidence against the idea.","failure_detail":"`error: undefined variable 'inputs' at nix/flake-modules/system.nix:328:19`.","learned_scope":"System module can reuse shared env from `packages.nix`, but it still needs direct `inputs` for source-bundle helpers later in the file."}}
{"run":62,"commit":"0c2e1ff","metric":9170,"metrics":{"build_ms":7524,"run_ms":1645,"image_bytes":637534208},"status":"discard","description":"First shared-env pass regressed badly, so this run cannot justify the refactor yet; it likely paid a large one-time rebuild/eval churn from changing both `packages.nix` and `system.nix`.","timestamp":1776312175475,"segment":7,"confidence":2.694,"iterationTokens":2095,"asi":{"hypothesis":"If `system.nix` reuses `redox-env` data already computed in `packages.nix`, the smoke benchmark should avoid a second expensive env/nixpkgs instantiation and lower dirty build_ms.","rollback_reason":"Primary metric jumped to 9170ms on the first run, so this pass is not enough evidence to keep.","next_action_hint":"Reapply `/tmp/redox-share-redox-env.patch` and rerun once; if the second pass still loses to the 7101ms `system.nix` control and 6552 observed best, drop this refactor.","saved_patch":"/tmp/redox-share-redox-env.patch","result":"Smoke semantics stayed green; regression came from build/eval churn, not guest behavior.","observed_tradeoff":"Changing both flake modules appears to invalidate enough cached work that a second pass is needed before judging steady state."}}
{"run":63,"commit":"3813e84","metric":6126,"metrics":{"build_ms":4765,"run_ms":1361,"image_bytes":637534208},"status":"keep","description":"Keep shared flake env wiring: `packages.nix` now exports `legacyPackages.redoxEnv`, and `system.nix` reuses it instead of instantiating `redox-env.nix` a second time, dropping the dirty smoke benchmark from the 7101ms `system.nix` control to 6126.","timestamp":1776312198162,"segment":7,"confidence":4.6787416587225925,"iterationTokens":1412,"asi":{"hypothesis":"If `system.nix` reuses `redox-env` data already computed in `packages.nix`, the smoke benchmark should avoid a second expensive env/nixpkgs instantiation and lower dirty build_ms.","result":"Second pass improved total_ms to 6126 with build_ms=4765.","validation":"Smoke suite still passed 18/18 with unchanged image size. The first pass paid one-time churn from touching both flake modules, but the rerun beat both the 7101ms `system.nix` control and the prior warning-cleaned observed best.","key_design_choice":"Export the shared environment through `legacyPackages.redoxEnv` instead of adding new flake-module plumbing, so `system.nix` can reuse exactly the data already computed on the `packages.nix` path.","observed_tradeoff":"run_ms stayed noisy, but build_ms dropped by about 879ms versus the `system.nix` dirty control and about 553ms versus the prior warning-cleaned rerun.","next_action_hint":"Validation-rerun the kept shared-env tree, then prune stale ideas and look for the next flake-eval hotspot now that duplicate env evaluation is gone."}}
{"run":64,"commit":"3813e84","metric":5598,"metrics":{"build_ms":4622,"run_ms":976,"image_bytes":637534208},"status":"discard","description":"Validation rerun of the shared-env refactor came in even faster at 5598ms, confirming the duplicate `redox-env` evaluation was a real dirty-build hotspot and that the keep's run_ms was still a bit noisy.","timestamp":1776312213997,"segment":7,"confidence":4.469945355191257,"iterationTokens":1174,"asi":{"hypothesis":"Rerunning the unchanged shared-env tree should confirm whether the 6126ms keep was real or a one-off.","rollback_reason":"No code changes in this run; confirmation only.","next_action_hint":"Update notes/ideas around the eval hotspot, then hunt the next remaining flake-eval cost now that the duplicate env import is gone.","result":"Same code reran at total_ms=5598 with build_ms=4622 and run_ms=976.","observed_noise":"The kept run had run_ms=1361; validation rerun dropped to 976 while build_ms also improved slightly, so the new steady-state is comfortably below all prior warning-cleaned runs."}}
{"run":65,"commit":"3813e84","metric":6037,"metrics":{"build_ms":4903,"run_ms":1133,"image_bytes":637534208},"status":"discard","description":"Dirty-tree control for `nix/flake-modules/redox-env.nix`: comment-only touch near the shared env setup measures the current no-op cost of editing this file under the smoke benchmark.","timestamp":1776312289597,"segment":7,"confidence":3.289544235924933,"iterationTokens":2875,"asi":{"hypothesis":"Before changing how `redox-env.nix` gets overlayed nixpkgs, measure the dirty-tree baseline cost of touching this file with no semantic change.","rollback_reason":"Comment-only control; no semantic improvement to keep.","next_action_hint":"Compare any `pkgsWithOverlay` refactor against this 6037ms control, not just against earlier runs from other files.","result":"Control run landed at total_ms=6037 with build_ms=4903.","control_use":"Use as dirty-tree reference for `redox-env.nix` eval-path experiments."}}
{"run":66,"commit":"3813e84","metric":5678,"metrics":{"build_ms":4699,"run_ms":978,"image_bytes":637534208},"status":"discard","description":"First `pkgs.extend` pass beat the `redox-env.nix` comment-only control but did not yet beat the current shared-env tree's best observed run, so it needs one steady-state rerun before judgment.","timestamp":1776312322690,"segment":7,"confidence":2.6023329798515378,"iterationTokens":1305,"asi":{"hypothesis":"Using `pkgs.extend` for the rust overlay inside `redox-env.nix` may be cheaper than re-importing `inputs.nixpkgs` with an overlay for every Redox env instantiation.","rollback_reason":"Primary metric improved versus the same-file control but not enough yet versus the current best observed shared-env runs, so this first pass is not enough evidence to keep.","next_action_hint":"Reapply `/tmp/redox-env-pkgs-extend.patch` and rerun once; only keep if the steady-state rerun beats the current shared-env tree.","saved_patch":"/tmp/redox-env-pkgs-extend.patch","result":"Smoke suite stayed green and build_ms improved versus the `redox-env.nix` dirty control.","control_reference":"run 65 `redox-env.nix` dirty-tree control was 6037ms with build_ms=4903."}}
{"run":67,"commit":"3813e84","metric":5613,"metrics":{"build_ms":4640,"run_ms":972,"image_bytes":637534208},"status":"discard","description":"Steady-state `pkgs.extend` overlay wiring was effectively a wash: slightly better than the `redox-env.nix` dirty control, but still not better than the current shared-env tree's best observed run.","timestamp":1776312342517,"segment":7,"confidence":2.769751693002257,"iterationTokens":1198,"asi":{"hypothesis":"If `pkgs.extend` were meaningfully cheaper than re-importing nixpkgs-with-overlay inside `redox-env.nix`, the rerun after one-time churn would beat the current shared-env tree.","rollback_reason":"Second-pass total_ms 5613 is still above the current observed best 5598, so this overlay wiring tweak is not worth keeping.","next_action_hint":"Treat duplicate-env removal as the real eval win from this area; future work should target other remaining eval hotspots, not `pkgs.extend` vs `import nixpkgs` micro-tuning.","result":"Smoke suite stayed green and build_ms remained in the same neighborhood, but the primary metric did not improve.","control_reference":"run 65 `redox-env.nix` dirty-tree control was 6037ms; runs 66/67 show this tweak helps some, just not enough to justify another code path."}}
{"run":68,"commit":"3813e84","metric":6249,"metrics":{"build_ms":5105,"run_ms":1143,"image_bytes":637534208},"status":"discard","description":"First legacy core-packages pass regressed versus the current shared-env tree, so this refactor needs one steady-state rerun before judgment.","timestamp":1776312604415,"segment":7,"confidence":3.3162162162162163,"iterationTokens":3110,"asi":{"hypothesis":"If `system.nix` takes smoke-path core packages from `self'.legacyPackages` instead of `self'.packages`, it may avoid forcing the heavier `packages` output path during smoke evaluation.","rollback_reason":"First pass landed above the current observed best shared-env runs, so this single result is not enough evidence to keep.","next_action_hint":"Reapply `/tmp/redox-corepkgs-via-legacy.patch` and rerun once; keep only if the steady-state rerun beats the current shared-env tree.","saved_patch":"/tmp/redox-corepkgs-via-legacy.patch","result":"Smoke suite stayed green; any cost change is in flake evaluation, not runtime semantics.","observed_tradeoff":"This may still be valid after first-pass churn, but it started worse than the current tree."}}
{"run":69,"commit":"3813e84","metric":5915,"metrics":{"build_ms":4815,"run_ms":1099,"image_bytes":637534208},"status":"discard","description":"Steady-state legacy core-packages wiring still lost to the current shared-env tree, so routing smoke-path core packages through `legacyPackages` is not worth keeping.","timestamp":1776312624348,"segment":7,"confidence":3.3941908713692945,"iterationTokens":1095,"asi":{"hypothesis":"If `system.nix` pulled smoke-path core packages from `self'.legacyPackages` instead of `self'.packages`, it might avoid forcing the heavier package-output path during smoke evaluation.","rollback_reason":"Second-pass total_ms 5915 is still above the current observed best 5598, so this extra indirection is not a real win.","next_action_hint":"Keep the shared `redoxEnv` reuse, but drop further `legacyPackages` plumbing unless a later profile proves it helps.","saved_patch":"/tmp/redox-corepkgs-via-legacy.patch","result":"Smoke suite stayed green and build_ms remained respectable, but the primary metric did not improve enough.","observed_tradeoff":"Moving core packages into `legacyPackages` adds plumbing without beating the simpler shared-env design."}}
{"run":70,"commit":"3813e84","metric":6063,"metrics":{"build_ms":4862,"run_ms":1200,"image_bytes":637534208},"status":"discard","description":"Dirty-tree control for `nix/pkgs/infrastructure/mk-vm-test.nix`: comment-only touch near image staging measures the current no-op cost of editing the VM runner infrastructure.","timestamp":1776312692162,"segment":7,"confidence":3.5258620689655173,"iterationTokens":6271,"asi":{"hypothesis":"Before revisiting the Cloud Hypervisor overlay path, measure the dirty-tree baseline cost of touching `mk-vm-test.nix` with no semantic change.","rollback_reason":"Comment-only control; no semantic improvement to keep.","next_action_hint":"Compare any CH overlay candidate against this 6063ms control, not just against broader branch bests.","result":"Control run landed at total_ms=6063 with build_ms=4862.","control_use":"Use as dirty-tree reference for `mk-vm-test.nix` experiments."}}
{"run":71,"commit":"3813e84","metric":0,"metrics":{"build_ms":0,"run_ms":0,"image_bytes":0},"status":"crash","description":"Cloud Hypervisor qcow2 overlay retry crashed immediately: this CH build supports qcow2 images but has backing-file support disabled, so the overlay approach cannot replace the raw copy path here.","timestamp":1776312728985,"segment":7,"confidence":3.5258620689655173,"iterationTokens":1314,"asi":{"hypothesis":"A qcow2 overlay backed by the immutable store raw image would preserve exact guest semantics while removing the expensive CH raw-image copy from `mk-vm-test.nix`.","rollback_reason":"Cloud Hypervisor aborted before boot because qcow backing files are disabled in this build, so this path is unusable here.","next_action_hint":"Drop qcow2-overlay ideas for the current Cloud Hypervisor build; if revisiting run_ms work, try CH-supported disk formats or other staging strategies that do not depend on backing files.","failure_detail":"`Fatal error: VmBoot(... CreateQcowDiskSync(BackingFilesDisabled))` with warning `Non-raw image type detected` and explicit `Backing file support is disabled`.","learned_scope":"The earlier overlay hypothesis was blocked by the CH binary itself, not by benchmark noise. Any future qcow2 work needs no-backing-file conversion or a different VMM."}}
{"run":72,"commit":"3813e84","metric":6242,"metrics":{"build_ms":5188,"run_ms":1053,"image_bytes":637534208},"status":"discard","description":"Dirty-tree control for `nix/redox-system/profiles/functional-smoke-test.nix`: comment-only touch near the smoke profile knobs measures the current no-op cost of editing this profile.","timestamp":1776313425511,"segment":7,"confidence":4.103678929765886,"iterationTokens":17735,"asi":{"hypothesis":"Before changing smoke-specific hardware settings, measure the dirty-tree baseline cost of touching `functional-smoke-test.nix` with no semantic change.","rollback_reason":"Comment-only control; no semantic improvement to keep.","next_action_hint":"Compare any smoke-profile driver pruning against this 6242ms control, not just against branch-wide bests.","result":"Control run landed at total_ms=6242 with build_ms=5188.","control_use":"Use as dirty-tree reference for smoke-profile configuration experiments."}}
{"run":73,"commit":"3813e84","metric":15121,"metrics":{"build_ms":14083,"run_ms":1038,"image_bytes":637534208},"status":"discard","description":"First smoke-profile network-driver pruning pass rebuilt the smoke image path, so this run cannot judge steady-state value yet.","timestamp":1776313467725,"segment":7,"confidence":3.5258620689655173,"iterationTokens":883,"asi":{"hypothesis":"Because `functional-smoke-test` already has networking disabled, dropping `hardware.networkDrivers` to `[]` should remove unneeded VM NIC drivers from the smoke image without changing the workload.","rollback_reason":"Primary metric was dominated by first-run rebuild churn (~14s build_ms), so this pass is unusable as keep/discard evidence.","next_action_hint":"Reapply `/tmp/redox-smoke-no-net-drivers.patch` and rerun once; keep only if the steady-state pass beats the 6242ms smoke-profile control and the current shared-env tree.","saved_patch":"/tmp/redox-smoke-no-net-drivers.patch","result":"Smoke suite still passed with unchanged image size, so the candidate at least preserved current smoke semantics.","control_reference":"run 72 smoke-profile dirty control was 6242ms with build_ms=5188."}}
{"run":74,"commit":"3813e84","metric":6039,"metrics":{"build_ms":5002,"run_ms":1036,"image_bytes":637534208},"status":"discard","description":"Steady-state smoke-profile network-driver pruning beat the same-file control but still lost to the current shared-env tree, so removing VM NIC drivers from the smoke profile is not worth keeping on its own.","timestamp":1776313488443,"segment":7,"confidence":4.05955334987593,"iterationTokens":1073,"asi":{"hypothesis":"Because `functional-smoke-test` already has networking disabled, dropping `hardware.networkDrivers` to `[]` should remove unneeded VM NIC drivers from the smoke image without changing the workload.","rollback_reason":"Second-pass total_ms 6039 is still above the current observed best 5598, so this smoke-profile cleanup is not a real overall win.","next_action_hint":"Keep looking for larger eval/build wins; small smoke-profile driver pruning is below the remaining noise and does not move the primary metric enough.","saved_patch":"/tmp/redox-smoke-no-net-drivers.patch","result":"Smoke suite still passed and build_ms improved slightly versus the smoke-profile control, but the primary metric did not beat the current tree.","control_reference":"run 72 smoke-profile dirty control was 6242ms; run 74 improved that to 6039 but not enough versus the branch best."}}
{"run":75,"commit":"3813e84","metric":27131,"metrics":{"build_ms":26113,"run_ms":1017,"image_bytes":637534208},"status":"discard","description":"First smoke-only monolithic-base pass rebuilt the smoke image path heavily, so this run cannot judge steady-state value yet.","timestamp":1776313552803,"segment":7,"confidence":3.5258620689655173,"iterationTokens":1561,"asi":{"hypothesis":"Because `basePerCrate` is the largest remaining smoke-path eval hotspot, overriding only the smoke system to use the monolithic `modularPkgs.system.base` may reduce end-to-end smoke time when base itself is untouched.","rollback_reason":"Primary metric was dominated by first-run rebuild churn (~26s build_ms), so this pass is unusable as keep/discard evidence.","next_action_hint":"Reapply `/tmp/redox-smoke-monolithic-base.patch` and rerun once if you want a steady-state read, but treat any apparent win cautiously because this could overfit away base-edit iteration cost.","saved_patch":"/tmp/redox-smoke-monolithic-base.patch","result":"Smoke suite still passed with unchanged image size, so the smoke workload itself survived the base-package swap.","overfit_risk":"A smoke-only monolithic base could improve the benchmark while making actual base-driver edit loops worse, so it needs extra skepticism even if the rerun wins."}}
{"run":76,"commit":"3813e84","metric":4490,"metrics":{"build_ms":3462,"run_ms":1027,"image_bytes":637534208},"status":"discard","description":"Smoke-only monolithic `base` made the benchmark much faster, but this likely overfits away real base-edit iteration cost by bypassing the per-crate base package only in the smoke profile.","timestamp":1776313604099,"segment":7,"confidence":3.68192048012003,"iterationTokens":1059,"asi":{"hypothesis":"Because `basePerCrate` is the largest remaining smoke-path eval hotspot, overriding only the smoke system to use the monolithic `modularPkgs.system.base` may reduce end-to-end smoke time when base itself is untouched.","rollback_reason":"Despite the large primary-metric win, this change is benchmark-risky: it optimizes the smoke profile by sidestepping per-crate base evaluation and likely makes actual base-source edit loops less representative.","next_action_hint":"If revisiting, first compare monolithic-vs-per-crate smoke runs under an actual base-related source touch; do not keep this shortcut on no-op smoke numbers alone.","saved_patch":"/tmp/redox-smoke-monolithic-base.patch","result":"Steady-state smoke run dropped to total_ms=4490 with build_ms=3462 and unchanged image size.","overfit_risk":"The smoke benchmark benefits when base is untouched, but the dedicated smoke profile should not hide the costs of iterating on Redox base components themselves."}}
{"run":77,"commit":"3813e84","metric":13981,"metrics":{"build_ms":13137,"run_ms":843,"image_bytes":637534208},"status":"discard","description":"First smoke-profile virtio-only hardware pass rebuilt the image path, so this run cannot judge steady-state value yet.","timestamp":1776313802106,"segment":7,"confidence":3.272,"iterationTokens":1535,"asi":{"hypothesis":"Because the smoke runner is Cloud Hypervisor-only and networking is disabled, restricting the smoke profile to `storageDrivers = [ \"virtio-blkd\" ]` and `networkDrivers = [ ]` should remove unnecessary driver copying without changing the workload.","rollback_reason":"Primary metric was dominated by first-run rebuild churn (~13.1s build_ms), so this pass is unusable as keep/discard evidence.","next_action_hint":"Reapply `/tmp/redox-smoke-virtio-only.patch` and rerun once; keep only if the steady-state pass beats both the 6242ms smoke-profile control and the current shared-env tree.","saved_patch":"/tmp/redox-smoke-virtio-only.patch","result":"Smoke suite still passed and run_ms improved, so the candidate preserved current smoke semantics.","control_reference":"run 72 smoke-profile dirty control was 6242ms with build_ms=5188."}}
{"run":78,"commit":"3813e84","metric":14728,"metrics":{"build_ms":13575,"run_ms":1153,"image_bytes":637534208},"status":"discard","description":"First smoke-specific `baseSmokePerCrate` pass rebuilt the smoke image path heavily, so this run cannot judge steady-state value yet.","timestamp":1776314488156,"segment":7,"confidence":2.9799635701275045,"iterationTokens":1535,"asi":{"hypothesis":"If the smoke profile uses a per-crate base package pruned to only the daemons/drivers it actually needs, unit2nix workspace aggregation should shrink without falling back to the benchmark-risky monolithic `base` package.","rollback_reason":"Primary metric was dominated by first-run rebuild churn (~13.6s build_ms), so this pass is unusable as keep/discard evidence.","next_action_hint":"Reapply `/tmp/redox-base-smoke-subset.patch` and rerun once; if the steady-state pass beats the current shared-env tree, this is a stronger candidate than the monolithic-base shortcut.","saved_patch":"/tmp/redox-base-smoke-subset.patch","result":"Smoke suite still passed with unchanged image size, so the subset preserved current smoke semantics on the first run.","overfit_guard":"Unlike the monolithic-base shortcut, this still uses per-crate base builds for the smoke-needed members only; judge it on the second pass, not this rebuild-heavy first run."}}
{"run":79,"commit":"3813e84","metric":6546,"metrics":{"build_ms":5416,"run_ms":1129,"image_bytes":637534208},"status":"discard","description":"Steady-state `baseSmokePerCrate` still lost to the current shared-env tree, so pruning the base unit2nix graph to smoke-needed members is not enough on its own.","timestamp":1776314514043,"segment":7,"confidence":3.272,"iterationTokens":1165,"asi":{"hypothesis":"If the smoke profile uses a per-crate base package pruned to only the daemons/drivers it actually needs, unit2nix workspace aggregation should shrink without falling back to the benchmark-risky monolithic `base` package.","rollback_reason":"Second-pass total_ms 6546 is still above the current observed best 5598, so this direct basePerCrate-pruning attempt is not a win.","next_action_hint":"The remaining basePerCrate cost is likely deeper in unit2nix evaluation than simple workspace-member pruning at the caller. Next step: inspect `../unit2nix/` for ways to prune crate graph construction itself when members are selected.","saved_patch":"/tmp/redox-base-smoke-subset.patch","result":"Smoke suite stayed green with unchanged image size, but the primary metric regressed versus the current tree.","overfit_guard":"This was a more principled version of the monolithic-base shortcut, yet it still failed to beat the current tree."}}
{"run":80,"commit":"3813e84","metric":9719,"metrics":{"build_ms":6842,"run_ms":2876,"image_bytes":637534208},"status":"discard","description":"First vendored unit2nix host-crate pruning pass changed the package-eval path heavily, so this run cannot judge steady-state value yet.","timestamp":1776315096921,"segment":7,"confidence":2.9799635701275045,"iterationTokens":25992,"asi":{"hypothesis":"`build-from-unit-graph.nix` currently constructs a full host crate set even though base's host/build-script closure is tiny (~15 crates vs 229 total). A local patched copy that prunes host buildable crates to the actual build/proc-macro closure should cut eval-heavy smoke builds globally, not just via smoke-profile hacks.","rollback_reason":"Primary metric regressed on the first run, likely from first-pass churn after changing the unit2nix import path and vendoring a local copy, so this pass is unusable as keep/discard evidence.","next_action_hint":"Reapply `/tmp/redox-unit2nix-host-prune.patch` and rerun once; if the steady-state pass beats the current shared-env tree, this is the most credible unit2nix-level candidate so far.","saved_patch":"/tmp/redox-unit2nix-host-prune.patch","result":"Smoke suite still passed with unchanged image size; the first-run regression was in build/eval and runtime noise, not semantics.","unit2nix_signal":"For base-build-plan, measured host closure is only ~15 crates versus 229 total, so pruning host graph construction remains plausible despite this first churn-heavy run."}}
{"run":81,"commit":"3813e84","metric":9013,"metrics":{"build_ms":6143,"run_ms":2869,"image_bytes":637534208},"status":"discard","description":"Steady-state vendored unit2nix host-crate pruning still lost badly to the current tree, so pruning host buildable crates in the local `build-from-unit-graph` copy is not enough as implemented.","timestamp":1776315131578,"segment":7,"confidence":2.580441640378549,"iterationTokens":1210,"asi":{"hypothesis":"If unit2nix only constructs the host/build-script closure actually needed by the selected target graph, smoke builds should speed up because base's host closure is tiny (~15 crates).","rollback_reason":"Second-pass total_ms 9013 is far above the current observed best 5598 and even build_ms stayed worse, so this host-crate-pruning implementation is not a win.","next_action_hint":"Inspect whether vendoring the local unit2nix copy itself added overhead or whether the real hotspot is elsewhere in build-from-unit-graph (for example target crate attrset construction or helper imports).","saved_patch":"/tmp/redox-unit2nix-host-prune.patch","result":"Smoke suite stayed green but both total_ms and build_ms regressed versus the current tree.","unit2nix_signal":"The measured host closure size alone was not enough to produce a benchmark win in this implementation."}}
{"run":82,"commit":"3813e84","metric":8813,"metrics":{"build_ms":6204,"run_ms":2608,"image_bytes":637534208},"status":"discard","description":"Control for vendoring `build-from-unit-graph.nix` locally: simply routing Redox through a local copy of the current upstream unit2nix file already regressed badly, so recent unit2nix-local experiments are confounded by the vendored path itself.","timestamp":1776315224471,"segment":7,"confidence":2.0956447480785654,"iterationTokens":2590,"asi":{"hypothesis":"Before trusting deeper unit2nix-file edits, check whether importing a vendored local copy of the same upstream `build-from-unit-graph.nix` is itself neutral on the smoke benchmark.","rollback_reason":"Even the no-op vendored control regressed sharply, so local-copy unit2nix experiments are not clean evidence for a real product win in Redox.","next_action_hint":"Avoid vendoring `build-from-unit-graph.nix` inside Redox for benchmark experiments. If targeting unit2nix next, either update the actual input cleanly or find Redox-side hotspots that do not depend on a local copy.","saved_patch":"/tmp/redox-unit2nix-vendor-control.patch","result":"Smoke suite still passed, but total_ms=8813/build_ms=6204 showed that the local-copy path itself is costly here.","confounder":"The earlier host-closure-pruning experiment likely mixed its own logic with this vendor-path regression, so do not over-interpret that loss."}}
{"run":83,"commit":"3813e84","metric":9011,"metrics":{"build_ms":6161,"run_ms":2850,"image_bytes":637534208},"status":"discard","description":"Steady-state vendored unit2nix control still regressed badly, confirming that routing Redox through a local copy of `build-from-unit-graph.nix` is itself a bad benchmark path here.","timestamp":1776315328865,"segment":7,"confidence":1.857683573050719,"iterationTokens":3668,"asi":{"hypothesis":"If vendoring the current upstream `build-from-unit-graph.nix` locally were neutral, then deeper unit2nix-local experiments inside Redox would still be trustworthy.","rollback_reason":"Second-pass total_ms 9011 is far above the current observed best 5598, so local-copy unit2nix experiments inside Redox are confounded and not worth pursuing further in this form.","next_action_hint":"Drop in-repo vendored unit2nix experiments. Either update the real unit2nix input cleanly or return to Redox-side hotspots that do not require a local copy of the dependency.","saved_patch":"/tmp/redox-unit2nix-vendor-control.patch","result":"Smoke suite stayed green but build_ms/run_ms remained much worse than the current tree even on the second pass.","confounder":"This means the earlier vendored host-pruning loss cannot be trusted as evidence about the host-closure idea itself."}}
{"run":84,"commit":"3813e84","metric":12483,"metrics":{"build_ms":10834,"run_ms":1648,"image_bytes":637534208},"status":"discard","description":"Base-touch control for the current per-crate smoke path: bumping `base-src-patched`'s derivation name forces the base package path to change, approximating a real base-related edit without semantic drift.","timestamp":1776315479178,"segment":7,"confidence":1.8097345132743363,"iterationTokens":455,"asi":{"hypothesis":"Before trusting the smoke-only monolithic `base` shortcut, compare it against the current tree under an actual base-package rebuild trigger rather than a no-op smoke rerun.","rollback_reason":"Control run only; no product improvement intended.","next_action_hint":"Apply the same base-touch trigger together with the smoke-only monolithic `base` override and compare against this 12483ms control.","result":"Per-crate base-touch control landed at total_ms=12483 with build_ms=10834.","control_use":"Use as base-edit-like reference for monolithic-base overfit validation."}}
{"run":85,"commit":"3813e84","metric":27277,"metrics":{"build_ms":25950,"run_ms":1326,"image_bytes":637534208},"status":"discard","description":"Base-touch validation killed the smoke-only monolithic `base` shortcut: under the same forced base-package rebuild trigger, the monolithic smoke path was far slower than the current per-crate control.","timestamp":1776315539748,"segment":7,"confidence":1.7245256500351371,"iterationTokens":1136,"asi":{"hypothesis":"If the smoke-only monolithic `base` shortcut were a real product win instead of benchmark overfit, it should stay competitive when the base package itself changes.","rollback_reason":"Under the same base-touch trigger, the monolithic smoke path ballooned to 27277ms versus the current per-crate control at 12483ms, confirming it hides real base-edit iteration cost.","next_action_hint":"Retire the monolithic-base idea from the backlog. Future work should target real unit2nix/basePerCrate costs without bypassing them in the smoke profile.","result":"Monolithic-base + base-touch landed at total_ms=27277 with build_ms=25950.","control_reference":"run 84 per-crate base-touch control was total_ms=12483 with build_ms=10834.","validation":"This was the same non-semantic base-package rebuild trigger (patchedSrc name bump) on both paths, so the comparison isolates the smoke-only base-package choice."}}
{"run":86,"commit":"3813e84","metric":6621,"metrics":{"build_ms":5751,"run_ms":869,"image_bytes":637534208},"status":"discard","description":"Control for benchmarking the real local unit2nix input path: overriding Redox to the current `../unit2nix` HEAD (without extra changes) is somewhat slower than the locked input, so future upstream-style experiments must compare against this override baseline, not against the locked upstream input.","timestamp":1776315994022,"segment":7,"confidence":1.8097345132743363,"iterationTokens":12364,"asi":{"hypothesis":"Before changing `../unit2nix`, measure the cost of using the real local unit2nix repo through `--override-input` so upstream experiments are compared fairly.","rollback_reason":"Control run only; no product improvement intended.","next_action_hint":"Patch `../unit2nix` directly and compare against this 6621ms real-input control, not the 5598ms locked-input best.","result":"Real-input control with current `../unit2nix` HEAD landed at total_ms=6621 with build_ms=5751.","control_use":"Use as baseline for experiments that change the actual `../unit2nix` repo and benchmark via `UNIT2NIX_INPUT=git+file:///...`."}}
{"run":87,"commit":"3813e84","metric":6652,"metrics":{"build_ms":5649,"run_ms":1002,"image_bytes":637534208},"status":"discard","description":"First real-input unit2nix host/member-closure pruning pass was essentially flat versus the local-input control, so it needs a steady-state rerun before judgment.","timestamp":1776316085217,"segment":7,"confidence":1.857683573050719,"iterationTokens":3799,"asi":{"hypothesis":"Pruning `build-from-unit-graph.nix` to only the selected target closure plus actual host/build-script closure should reduce unit2nix eval work for large plans like Redox base when benchmarked through the real unit2nix input path.","rollback_reason":"First pass landed basically on top of the local-unit2nix control, so this single result is not enough evidence to keep or upstream.","next_action_hint":"Rerun the same committed `../unit2nix` change against the same `UNIT2NIX_INPUT=git+file:///...` path; only treat it as real if the second pass clearly beats the 6621ms local-input control.","result":"Real-input patched unit2nix run landed at total_ms=6652 with build_ms=5649.","control_reference":"run 86 local unit2nix input control was total_ms=6621 with build_ms=5751."}}
{"run":88,"commit":"3813e84","metric":6833,"metrics":{"build_ms":5772,"run_ms":1060,"image_bytes":637534208},"status":"discard","description":"Steady-state real-input unit2nix host/member-closure pruning still lost to the local-input control, so this upstream candidate is not worth pursuing as implemented.","timestamp":1776316105762,"segment":7,"confidence":2.0956447480785654,"iterationTokens":961,"asi":{"hypothesis":"If `build-from-unit-graph.nix` only constructed the selected target closure plus the actual host/build-script closure, the real unit2nix input path should beat the 6621ms local-input control.","rollback_reason":"Second-pass total_ms 6833 is worse than the 6621ms local-input control, so this specific upstream pruning patch is not a win.","next_action_hint":"Reset `../unit2nix` off this commit and look for a different upstream lever, or move back to Redox-side hotspots that do not depend on this unit2nix shape.","result":"Second patched-unit2nix run landed at total_ms=6833 with build_ms=5772.","control_reference":"run 86 local unit2nix input control was total_ms=6621 with build_ms=5751."}}
{"run":89,"commit":"3813e84","metric":7438,"metrics":{"build_ms":6347,"run_ms":1090,"image_bytes":637534208},"status":"discard","description":"Comment-only dirty control for `nix/redox-system/lib/make-disk-image.nix` to establish the current same-file benchmark floor before testing larger-block final partition writes.","timestamp":1776316620591,"segment":7,"confidence":2.1265164644714036,"iterationTokens":961,"asi":{"hypothesis":"A same-file dirty control on `make-disk-image.nix` is needed before judging any final GPT assembly tweak in that file.","rollback_reason":"Control run only; no product improvement intended.","next_action_hint":"Apply the larger-block `dd` write change in `make-disk-image.nix` and compare against this 7438ms same-file dirty control.","result":"Comment-only make-disk-image control landed at total_ms=7438 with build_ms=6347.","control_use":"Use as immediate control for `make-disk-image.nix` write-granularity experiments."}}
{"run":90,"commit":"3813e84","metric":12062,"metrics":{"build_ms":11017,"run_ms":1044,"image_bytes":637534208},"status":"discard","description":"Larger-block final partition writes in `make-disk-image.nix` regressed badly; switching the final `dd` splices from 512-byte sectors to 1MiB writes blew the smoke benchmark up instead of helping.","timestamp":1776316657899,"segment":7,"confidence":1.983030303030303,"iterationTokens":1145,"asi":{"hypothesis":"Because both partition payloads start on MiB boundaries, writing them into `disk.img` with `dd bs=1M` might cut host-side syscall overhead versus the current sector-sized writes.","rollback_reason":"The candidate regressed hard: total_ms 12062 and build_ms 11017 versus the same-file comment-only control at 7438 / 6347.","next_action_hint":"Do not pursue the larger-block final `dd` splice idea further; move on to a different disk-image or runner-side lever.","result":"`make-disk-image.nix` with `dd bs=1M` for both partition writes landed at total_ms=12062 with build_ms=11017.","control_reference":"run 89 comment-only `make-disk-image.nix` control was total_ms=7438 with build_ms=6347."}}
{"run":91,"commit":"3813e84","metric":0,"metrics":{"build_ms":0,"run_ms":0,"image_bytes":0},"status":"crash","description":"Read-only smoke disk experiment failed at boot: Cloud Hypervisor rejected a guest block write on the raw image (`Request check failed ... ReadOnly`), so the smoke image does require writable disk semantics during early boot.","timestamp":1776316846492,"segment":7,"confidence":1.983030303030303,"iterationTokens":11185,"asi":{"hypothesis":"If the smoke runner could boot directly from the store image with `readonly=on`, it could skip the per-run raw-image copy in `mk-vm-test.nix` and shave run_ms without changing guest semantics.","rollback_reason":"Boot failed immediately because the guest attempted a disk write against the read-only virtio-blk device.","next_action_hint":"Do not pursue read-only raw-disk boot for the smoke runner unless Redox can boot with a writable overlay or otherwise avoid early rootfs writes.","error_detail":"Cloud Hypervisor logged `Request check failed ... ReadOnly` for an `Out` request during boot."}}
{"run":92,"commit":"3813e84","metric":14641,"metrics":{"build_ms":13560,"run_ms":1080,"image_bytes":637534208},"status":"discard","description":"Writing the ESP, RedoxFS, and final disk images directly into `$out` was much slower than building them in the work dir and copying at the end; direct-to-output image creation is a bad path here.","timestamp":1776316953047,"segment":7,"confidence":1.903801396431342,"iterationTokens":9173,"asi":{"hypothesis":"Creating the image artifacts directly at `$out` in `make-esp-image.nix`, `make-redoxfs-image.nix`, and `make-disk-image.nix` might avoid large final copy steps and cut build_ms.","rollback_reason":"The direct-to-output approach regressed hard: total_ms 14641 / build_ms 13560, far worse than the current tree.","next_action_hint":"Do not pursue direct-to-output image construction further; move on to a different image-build or eval hotspot.","result":"Direct-to-output image creation landed at total_ms=14641 with build_ms=13560.","notes":"This suggests the current temp-build-then-copy pattern interacts better with the builder/store path than writing large raw images into `$out` incrementally."}}
{"run":93,"commit":"3813e84","metric":7042,"metrics":{"build_ms":5964,"run_ms":1078,"image_bytes":637534208},"status":"discard","description":"Comment-only dirty control for `nix/pkgs/infrastructure/mk-vm-test.nix` before testing incremental serial-log polling in the VM runner.","timestamp":1776317028036,"segment":7,"confidence":1.983030303030303,"iterationTokens":4276,"asi":{"hypothesis":"A same-file dirty control on `mk-vm-test.nix` is needed before judging polling-loop changes in that runner.","rollback_reason":"Control run only; no product improvement intended.","next_action_hint":"Replace the full-file serial-log reread in `mk-vm-test.nix` with incremental append polling and compare against this 7042ms control.","result":"Comment-only mk-vm-test control landed at total_ms=7042 with build_ms=5964 and run_ms=1078.","control_use":"Use as immediate control for mk-vm-test polling-loop experiments."}}
{"run":94,"commit":"3813e84","metric":7049,"metrics":{"build_ms":5965,"run_ms":1083,"image_bytes":637534208},"status":"discard","description":"Incremental serial-log polling in `mk-vm-test.nix` was flat-to-worse versus the same-file control; avoiding full rereads of the serial log did not buy a real smoke benchmark win here.","timestamp":1776317058317,"segment":7,"confidence":2.1265164644714036,"iterationTokens":1652,"asi":{"hypothesis":"Keeping an in-memory accumulated serial buffer and only appending newly written bytes from `SERIAL_LOG` would cut host-side polling overhead in `mk-vm-test.nix`, improving run_ms for the smoke runner.","rollback_reason":"The candidate landed at 7049ms / 1083ms run_ms versus the mk-vm-test control at 7042ms / 1078ms, so there is no real win.","next_action_hint":"Do not pursue incremental serial-log polling further for this benchmark; look elsewhere for meaningful build_ms or run_ms savings.","result":"Incremental mk-vm-test serial polling landed at total_ms=7049 with build_ms=5965 and run_ms=1083.","control_reference":"run 93 comment-only mk-vm-test control was total_ms=7042 with build_ms=5964 and run_ms=1078."}}
{"run":95,"commit":"3813e84","metric":7521,"metrics":{"build_ms":5906,"run_ms":1615,"image_bytes":637534208},"status":"discard","description":"Comment-only dirty control for `nix/flake-modules/packages.nix` before testing whether `mkCrossPackage` should pass `members = [ member ]` into unit2nix.","timestamp":1776317160633,"segment":7,"confidence":2.212804328223625,"iterationTokens":4559,"asi":{"hypothesis":"A same-file dirty control on `packages.nix` is needed before judging `mkCrossPackage` member-filtering tweaks.","rollback_reason":"Control run only; no product improvement intended.","next_action_hint":"Add `members = [ member ]` in `mkCrossPackage` and compare against this 7521ms packages.nix control, focusing on build_ms because run_ms was noisy.","result":"Comment-only packages.nix control landed at total_ms=7521 with build_ms=5906.","control_use":"Use as immediate control for mkCrossPackage member-filtering experiments."}}
{"run":96,"commit":"3813e84","metric":7412,"metrics":{"build_ms":5895,"run_ms":1516,"image_bytes":637534208},"status":"discard","description":"Passing `members = [ member ]` from `mkCrossPackage` into unit2nix was effectively flat versus the same-file control; current locked unit2nix only uses `members` to filter exposed outputs, so this Redox-side hint does not buy a meaningful smoke benchmark win.","timestamp":1776317187054,"segment":7,"confidence":2.306390977443609,"iterationTokens":1033,"asi":{"hypothesis":"Even without deeper unit2nix graph pruning, giving `buildFromUnitGraph` a single selected workspace member from `mkCrossPackage` might trim enough output-side eval work to help packages like ion on the smoke path.","rollback_reason":"The candidate was essentially noise: 7412 / 5895 versus the packages.nix control at 7521 / 5906, with no meaningful build_ms win.","next_action_hint":"Do not pursue `members = [ member ]` as a Redox-side optimization on current unit2nix; if member filtering matters, it needs a stronger upstream implementation.","result":"`mkCrossPackage` with `members = [ member ]` landed at total_ms=7412 with build_ms=5895.","control_reference":"run 95 comment-only packages.nix control was total_ms=7521 with build_ms=5906."}}
{"run":97,"commit":"3813e84","metric":7573,"metrics":{"build_ms":6034,"run_ms":1538,"image_bytes":637534208},"status":"discard","description":"Comment-only dirty control for `nix/redox-system/lib/make-esp-image.nix` before testing whether the ESP still needs kernel/initfs payload copies.","timestamp":1776317435546,"segment":7,"confidence":2.1736049601417182,"iterationTokens":6831,"asi":{"hypothesis":"A same-file dirty control on `make-esp-image.nix` is needed before judging changes to the ESP payload contents.","rollback_reason":"Control run only; no product improvement intended.","next_action_hint":"Remove the kernel/initfs copies from `make-esp-image.nix` and compare against this 7573ms control while verifying the smoke image still boots normally.","result":"Comment-only make-esp-image control landed at total_ms=7573 with build_ms=6034.","control_use":"Use as immediate control for ESP-payload experiments."}}
{"run":98,"commit":"3813e84","metric":13006,"metrics":{"build_ms":11858,"run_ms":1147,"image_bytes":637534208},"status":"discard","description":"Dropping kernel/initfs from the ESP image did not help; the first run regressed badly even though the smoke VM still booted, so this is not an obvious product win.","timestamp":1776317488744,"segment":7,"confidence":2.0552763819095476,"iterationTokens":1074,"asi":{"hypothesis":"Because the current bootloader loads kernel+initfs from RedoxFS `/usr/lib/boot`, removing those large payload copies from `make-esp-image.nix` might cut disk-image build time without changing boot behavior.","rollback_reason":"The candidate's first measured result regressed hard: total_ms 13006 and build_ms 11858 versus the same-file control at 7573 / 6034.","next_action_hint":"Do not assume ESP payload removal helps; only revisit if a second dedicated steady-state measurement shows the regression was a one-off artifact.","result":"Smoke boot still passed without kernel/initfs in the ESP, but the candidate run landed at total_ms=13006 with build_ms=11858.","control_reference":"run 97 comment-only `make-esp-image.nix` control was total_ms=7573 with build_ms=6034."}}
{"run":99,"commit":"3813e84","metric":8739,"metrics":{"build_ms":6974,"run_ms":1764,"image_bytes":637534208},"status":"discard","description":"Replacing `parted` with deterministic `sgdisk` GPT creation fixed `redox-disk-image-unstable` nondeterminism, but it regressed the current smoke benchmark enough that it is not a primary-metric keep.","timestamp":1776317774242,"segment":7,"confidence":1.9300039323633504,"iterationTokens":1406,"asi":{"hypothesis":"Using deterministic GPT creation in `make-disk-image.nix` could both eliminate the blocked `--rebuild` nondeterminism and maybe reduce build overhead versus multiple `parted` calls.","rollback_reason":"Steady-state smoke got worse: 8739 / 6974 / 1764 versus the same-file `make-disk-image.nix` control at 7438 / 6347 / 1090, so this is not a speed win for the active benchmark.","next_action_hint":"Keep the root-cause note that GPT disk/partition GUID randomness is the `--rebuild` blocker, but do not keep the `sgdisk` swap in the primary-speed branch unless it can be made much faster.","result":"The deterministic `sgdisk` version made `nix build .#redox-functional-smoke-test --rebuild --no-link` succeed (exit 0), confirming the nondeterminism came from random GPT GUIDs.","control_reference":"run 89 comment-only `make-disk-image.nix` control was total_ms=7438 with build_ms=6347.","secondary_value":"This candidate unblocked rebuild determinism even though it lost on the current primary metric."}}
{"run":100,"commit":"3813e84","metric":9988,"metrics":{"build_ms":6855,"run_ms":3132,"image_bytes":637534208},"status":"discard","description":"Fresh comment-only dirty control for `nix/redox-system/lib/make-disk-image.nix` before testing a faster deterministic GPT patch on top of the current `parted` path.","timestamp":1776317988567,"segment":7,"confidence":1.8191252779836917,"iterationTokens":8109,"asi":{"hypothesis":"A same-file dirty control on `make-disk-image.nix` should be refreshed before judging deterministic GPT patching, because this file has seen several failed image-build experiments already.","rollback_reason":"Control run only; no product improvement intended.","next_action_hint":"Patch the current `parted` path to normalize GPT GUIDs and CRCs in place, then compare primarily on build_ms against this fresh control.","result":"Fresh make-disk-image control landed at total_ms=9988 with build_ms=6855 and noisy run_ms=3132.","control_use":"Use mainly as an immediate build_ms control for deterministic GPT patching experiments."}}
{"run":101,"commit":"6d6c31a","metric":6758,"metrics":{"build_ms":5753,"run_ms":1004,"image_bytes":637534208},"status":"keep","description":"Keep deterministic GPT patching on top of the current `parted` path: normalizing GPT disk/partition GUIDs and CRCs in place fixed `redox-disk-image-unstable` rebuild determinism and the steady smoke rerun beat the same-file `make-disk-image.nix` controls.","timestamp":1776318134820,"segment":7,"confidence":1.9300039323633504,"iterationTokens":1236,"asi":{"hypothesis":"Patch GPT disk/partition GUIDs and header CRCs in place after the fast `parted` layout step, so rebuild determinism is restored without paying the full `sgdisk` regression cost.","result":"The steady candidate run landed at total_ms=6758 with build_ms=5753 and run_ms=1004, and `nix build .#redox-functional-smoke-test --rebuild --no-link` exited 0 on the patched tree.","control_reference":"Fresh same-file control was run 100 at 9988 / build_ms 6855 with noisy run_ms, and the earlier same-file make-disk-image control was run 89 at 7438 / build_ms 6347.","secondary_value":"Unlike the slower full `sgdisk` rewrite, this patch keeps the fast `parted` path but removes GPT GUID randomness, so rebuild benchmarking is now unblocked on the kept tree.","notes":"The first candidate run was slower, but the steady rerun was clearly better and the determinism check passed."}}
{"run":102,"commit":"6d6c31a","metric":7280,"metrics":{"build_ms":6248,"run_ms":1031,"image_bytes":637534208},"status":"discard","description":"Post-keep validation on a clean tree: the deterministic GPT patch still passes smoke and fixes rebuild determinism, but this clean rerun did not beat the pre-existing trustworthy best total_ms for the branch.","timestamp":1776318186686,"segment":7,"confidence":1.9774375503626107,"iterationTokens":3300,"asi":{"hypothesis":"After committing the deterministic GPT patch, a clean-tree validation rerun should confirm whether the keep is also a real branch-level primary-metric win rather than only a same-file dirty improvement.","rollback_reason":"Validation landed at total_ms 7280, which does not beat the branch's earlier trustworthy best 5598, so the primary-metric value of this keep remains suspect.","next_action_hint":"Test the inverse experiment: revert the deterministic GPT patch on top of current HEAD and see whether the branch-level smoke benchmark improves enough to justify dropping the keep despite its determinism benefit.","result":"Clean-tree validation of commit 6d6c31a2 landed at total_ms=7280 with build_ms=6248 and run_ms=1031.","branch_best_reference":"Earlier trustworthy branch best remained total_ms=5598 / build_ms=4622 / run_ms=976 at commit 3813e847."}}
{"run":103,"commit":"6d6c31a","metric":6898,"metrics":{"build_ms":5863,"run_ms":1034,"image_bytes":637534208},"status":"discard","description":"Inverse experiment lost: reverting the deterministic GPT patch on top of current HEAD was slightly slower than the kept same-file candidate, so the in-place GPT normalization still looks better than falling back to raw `parted` randomness.","timestamp":1776318246403,"segment":7,"confidence":2.035669846536707,"iterationTokens":3357,"asi":{"hypothesis":"If the deterministic GPT patch only looked good because of noisy validation, explicitly reverting it on top of current HEAD should recover a faster smoke benchmark.","rollback_reason":"The revert candidate landed at total_ms 6898 / build_ms 5863, which is slightly worse than the kept same-file candidate at 6758 / 5753.","next_action_hint":"Keep the deterministic GPT patch for now; future work should look elsewhere or find a cleaner validation method instead of immediately reverting this change.","result":"Reverting `make-disk-image.nix` back to plain `parted` randomness on top of HEAD landed at total_ms=6898 with build_ms=5863.","comparison_reference":"The kept same-file candidate was run 101 at total_ms=6758 with build_ms=5753, while the clean-tree validation of the kept commit was run 102 at 7280 / 6248."}}
{"run":104,"commit":"6d6c31a","metric":9223,"metrics":{"build_ms":7891,"run_ms":1330,"image_bytes":637534208},"status":"discard","description":"Fresh comment-only dirty control for `nix/redox-system/lib/make-disk-image.nix` before testing whether the disk image output's boot payloads should be symlinks instead of copied files.","timestamp":1776318411035,"segment":7,"confidence":1.9774375503626107,"iterationTokens":16899,"asi":{"hypothesis":"A same-file dirty control on `make-disk-image.nix` is needed before judging a smaller install-phase optimization in the same file.","rollback_reason":"Control run only; no product improvement intended.","next_action_hint":"Switch the disk image output's `boot/` payload copies to symlinks and compare mostly on build_ms against this fresh control.","result":"Fresh make-disk-image control landed at total_ms=9223 with build_ms=7891 and run_ms=1330.","control_use":"Use as immediate control for disk-image output boot-payload symlink experiments."}}
{"run":105,"commit":"6d6c31a","metric":12427,"metrics":{"build_ms":11356,"run_ms":1070,"image_bytes":637534208},"status":"discard","description":"Symlinking the disk image output's `boot/` payloads instead of copying them regressed hard; preserving those boot files as real copies is the better path here.","timestamp":1776318446626,"segment":7,"confidence":1.8949806949806949,"iterationTokens":1033,"asi":{"hypothesis":"Replacing the disk image derivation's copied `boot/BOOTX64.EFI`, `boot/kernel`, and `boot/initfs` payloads with symlinks might cut install-phase copy time without changing the exposed output interface much.","rollback_reason":"The candidate regressed sharply: total_ms 12427 / build_ms 11356 versus the same-file control at 9223 / 7891.","next_action_hint":"Do not pursue boot-payload symlinks for the disk image output; look for a different build_ms lever.","result":"Disk-image output boot symlinks landed at total_ms=12427 with build_ms=11356.","control_reference":"run 104 comment-only `make-disk-image.nix` control was total_ms=9223 with build_ms=7891."}}
{"run":106,"commit":"6d6c31a","metric":7451,"metrics":{"build_ms":6154,"run_ms":1296,"image_bytes":637534208},"status":"discard","description":"Comment-only dirty control for wiring `bootloaderPerCrate` into system builds, touching both `packages.nix` and `system.nix` before the real experiment.","timestamp":1776318584988,"segment":7,"confidence":1.8492840994724944,"iterationTokens":13046,"asi":{"hypothesis":"A same-path dirty control is needed before judging whether system images should switch from the monolithic bootloader derivation to the existing per-crate bootloader path.","rollback_reason":"Control run only; no product improvement intended.","next_action_hint":"Export `bootloaderPerCrate` from `packages.nix`, wire `system.nix` to use it, then compare against this control.","result":"Combined comment-only bootloader wiring control landed at total_ms=7451 with build_ms=6154.","control_use":"Use as immediate control for the bootloaderPerCrate wiring experiment."}}
{"run":107,"commit":"6d6c31a","metric":7307,"metrics":{"build_ms":5767,"run_ms":1539,"image_bytes":637534208},"status":"keep","description":"Keep wiring system images to the existing `bootloaderPerCrate` output: after a slower first pass, the steady rerun beat the same-path control on total_ms and build_ms.","timestamp":1776318645838,"segment":7,"confidence":1.9399209486166007,"iterationTokens":352,"asi":{"hypothesis":"Switching system builds from the monolithic bootloader derivation to the already-implemented `bootloaderPerCrate` path should reduce smoke-path eval/build work without changing product semantics.","result":"First candidate run landed at 7701 / build_ms 6273, but the steady rerun landed at total_ms=7307 with build_ms=5767 and run_ms=1539.","control_reference":"run 106 combined comment-only control was total_ms=7451 with build_ms=6154 and run_ms=1296.","reason_to_keep":"Primary metric improved and build_ms improved materially on the steady rerun; this is a product-wide system-image change, not a smoke-only shortcut.","notes":"This change only wires system.nix to use the existing per-crate bootloader path and exports that attr from packages.nix."}}
{"run":108,"commit":"47de3c5","metric":8271,"metrics":{"build_ms":5950,"run_ms":2320,"image_bytes":637534208},"status":"keep","description":"Retry keep after hook-formatting interruption: the `bootloaderPerCrate` wiring still passes smoke, and the code should be committed as the new product baseline despite noisy run_ms on this confirmation rerun.","timestamp":1776318714071,"segment":7,"confidence":1.9082426127527217,"iterationTokens":8472,"asi":{"hypothesis":"After restaging the formatter-adjusted files from the failed commit attempt, another keep cycle should record and commit the existing `bootloaderPerCrate` wiring change cleanly.","result":"Confirmation rerun with the same code landed at total_ms=8271 with build_ms=5950 and run_ms=2320; earlier steadier evidence for this change was run 107 at 7307 / 5767.","reason_to_keep":"This run is noisy, but it is only a commit-finalization retry for an already-evaluated product change whose earlier steady rerun beat the same-path control.","commit_recovery":"Previous keep attempt failed after hooks reformatted `packages.nix`; this run exists to let log_experiment recommit the same change cleanly.","notes":"Change exports `bootloaderPerCrate` from packages.nix and wires system.nix to use it for system images."}}
{"run":109,"commit":"cf9ff90","metric":7878,"metrics":{"build_ms":6014,"run_ms":1863,"image_bytes":637534208},"status":"keep","description":"Keep reverting the `bootloaderPerCrate` wiring: that prior keep was not on the active smoke benchmark path because the smoke runner is Cloud-Hypervisor-only and does not consume the `bootloader` arg used by QEMU paths.","timestamp":1776318779762,"segment":7,"confidence":1.9774375503626107,"iterationTokens":2937,"asi":{"hypothesis":"The previous `bootloaderPerCrate` keep was a benchmark confound: `functionalSmokeTest` runs only via Cloud Hypervisor, so changing the separate runner `bootloader` binding in `system.nix` should not count as a validated smoke-path optimization.","result":"Reverting the `bootloaderPerCrate` export/use still passes smoke; this run landed at total_ms=7878 with build_ms=6014 and run_ms=1863.","reason_to_keep":"This commit restores benchmark integrity by removing a change whose measured 'win' was not causally on the active CH smoke path.","causal_note":"`functionalSmokeTest` sets `defaultMode = \"ch\"` and `enableQemu = false`, and `mk-vm-test.nix` only uses the `bootloader` parameter on the QEMU launch path.","notes":"The per-crate bootloader builder itself remains available in packages.nix source as an implementation, but the system image/runners are switched back to the prior monolithic bootloader wiring until a relevant benchmark validates it."}}
{"run":110,"commit":"cf9ff90","metric":7779,"metrics":{"build_ms":5927,"run_ms":1851,"image_bytes":637534208},"status":"discard","description":"Comment-only dirty control for `nix/redox-system/profiles/functional-smoke-test.nix` before testing whether a smaller initfs daemon set helps the CH smoke profile.","timestamp":1776318890821,"segment":7,"confidence":2.051839464882943,"iterationTokens":6237,"asi":{"hypothesis":"A same-file dirty control on the smoke profile is needed before judging initfs-daemon trimming for the benchmark profile.","rollback_reason":"Control run only; no product improvement intended.","next_action_hint":"Try excluding a small set of clearly nonessential initfs daemons like `acpid`, `hwd`, and `rtcd`, then compare against this control.","result":"Comment-only smoke-profile control landed at total_ms=7779 with build_ms=5927 and run_ms=1851.","control_use":"Use as immediate control for smoke-profile initfs-daemon trimming experiments."}}
{"run":111,"commit":"cf9ff90","metric":0,"metrics":{"build_ms":0,"run_ms":0,"image_bytes":0},"status":"crash","description":"Excluding `acpid`, `hwd`, and `rtcd` from the smoke profile's initfs daemon set broke boot; switchroot reached `redoxfs ... failed with exit status: 1` and the VM never reached the smoke test runner.","timestamp":1776318985950,"segment":7,"confidence":2.051839464882943,"iterationTokens":891,"asi":{"hypothesis":"The Cloud-Hypervisor smoke profile might not need initfs daemons like `acpid`, `hwd`, and `rtcd`, so excluding them could shrink initfs work and improve smoke timing.","rollback_reason":"Boot failed before the test suite could start, so this daemon-trim set is not safe for the smoke profile.","next_action_hint":"Do not exclude `acpid`, `hwd`, and `rtcd` together; if daemon trimming is revisited, reduce the blast radius and test one daemon at a time.","error_detail":"Serial log showed `redoxfs --uuid ... file 0000000000000000 failed with exit status: 1` during switchroot after dropping those daemons."}}
{"run":112,"commit":"8ca281f","metric":7482,"metrics":{"build_ms":5960,"run_ms":1521,"image_bytes":637534208},"status":"keep","description":"Keep excluding `rtcd` from the smoke profile initfs daemon set: after a rebuild-heavy first pass, the steady rerun beat the same-file smoke-profile control on total_ms and run_ms.","timestamp":1776319043711,"segment":7,"confidence":2.0467055879899916,"iterationTokens":363,"asi":{"hypothesis":"The CH smoke profile does not need the time daemon in initfs, so excluding only `rtcd` may trim boot work without breaking the smoke workload.","result":"The first candidate run rebuilt broadly and landed at 16844 / 15117, but the steady rerun landed at total_ms=7482 with build_ms=5960 and run_ms=1521.","control_reference":"run 110 comment-only smoke-profile control was total_ms=7779 with build_ms=5927 and run_ms=1851.","reason_to_keep":"Primary metric improved on the steady rerun, the smoke workload still boots and passes normally, and this is a profile-specific reduction in genuinely unused early-boot work rather than a fake success shortcut.","notes":"Do not combine this with broader daemon removals like `acpid`/`hwd`/`rtcd`; that broke boot."}}
{"run":113,"commit":"8ca281f","metric":8682,"metrics":{"build_ms":6480,"run_ms":2201,"image_bytes":637534208},"status":"discard","description":"Comment-only dirty control for the on-path `bootloaderPerCrate` wiring experiment, touching `system.nix` and `packages.nix` on top of the current baseline.","timestamp":1776319232960,"segment":7,"confidence":2.029776674937965,"iterationTokens":363,"asi":{"hypothesis":"A fresh same-path control is needed before judging whether wiring `bootloaderPerCrate` into `mkFlatPkgs` changes the active CH smoke build path.","rollback_reason":"Control run only; no product improvement intended.","next_action_hint":"Export `bootloaderPerCrate` again and wire it into `mkFlatPkgs.bootloader`, then compare against this control.","result":"On-path bootloaderPerCrate comment-only control landed at total_ms=8682 with build_ms=6480 and run_ms=2201.","control_use":"Use as immediate control for the on-path bootloaderPerCrate experiment."}}
{"run":114,"commit":"8ca281f","metric":0,"metrics":{"build_ms":0,"run_ms":0,"image_bytes":0},"status":"crash","description":"On-path `bootloaderPerCrate` wiring cannot currently build because its referenced plan file is missing from the repo: `nix/pkgs/system/bootloader-build-plan.json`.","timestamp":1776319273890,"segment":7,"confidence":2.029776674937965,"iterationTokens":1079,"asi":{"hypothesis":"Wiring `mkFlatPkgs.bootloader` to the existing `bootloaderPerCrate` path might reduce active smoke build work if the per-crate bootloader artifact is actually available.","rollback_reason":"Evaluation failed immediately because `nix/pkgs/system/bootloader-build-plan.json` does not exist in the tracked repo, so the candidate is not buildable as-is.","next_action_hint":"Do not pursue on-path `bootloaderPerCrate` until the missing build plan is generated and tracked; treat the current `bootloaderPerCrate` implementation as incomplete/dead code for this benchmark.","error_detail":"Nix error: `Path 'nix/pkgs/system/bootloader-build-plan.json' does not exist in Git repository`."}}
{"run":115,"commit":"8ca281f","metric":8651,"metrics":{"build_ms":6009,"run_ms":2642,"image_bytes":637534208},"status":"discard","description":"Fresh comment-only dirty control for the smoke profile after the kept `rtcd` trim, before testing whether excluding `hwd` as well is safe and beneficial.","timestamp":1776319317494,"segment":7,"confidence":2.0172626387176327,"iterationTokens":1458,"asi":{"hypothesis":"A new same-file control is needed on top of the current `rtcd`-trimmed smoke profile before judging any further initfs daemon trimming.","rollback_reason":"Control run only; no product improvement intended.","next_action_hint":"Add `hwd` to the smoke profile's `initfsExcludeDaemons` list and compare against this control.","result":"Fresh smoke-profile control on top of the `rtcd` trim landed at total_ms=8651 with build_ms=6009 and run_ms=2642.","control_use":"Use as immediate control for testing `hwd` exclusion on top of the current profile."}}
{"run":116,"commit":"8ca281f","metric":0,"metrics":{"build_ms":0,"run_ms":0,"image_bytes":0},"status":"crash","description":"Adding `hwd` to the smoke profile's initfs daemon exclusions broke boot on top of the kept `rtcd` trim; switchroot again failed at `redoxfs ... file 0000000000000000`.","timestamp":1776319428753,"segment":7,"confidence":2.0172626387176327,"iterationTokens":917,"asi":{"hypothesis":"The CH smoke profile might still boot and run without `hwd`, making it a safe follow-up trim after excluding only `rtcd`.","rollback_reason":"Boot failed before the smoke suite started, so `hwd` is not safe to exclude from the current smoke profile.","next_action_hint":"Do not exclude `hwd` from the smoke profile initfs. If daemon trimming continues, try a different daemon with smaller boot coupling or stop chasing this class.","error_detail":"Serial log showed `redoxfs --uuid ... file 0000000000000000 failed with exit status: 1` during switchroot after excluding `hwd`."}}
{"run":117,"commit":"8ca281f","metric":2484,"metrics":{"build_ms":219,"run_ms":2264,"image_bytes":637534208},"status":"discard","description":"Discard the ultra-hot-cache `rtcd+ptyd` smoke-profile run as a confounded measurement; this followed multiple unlabeled reruns and is not a fair basis for a keep decision.","timestamp":1776319534355,"segment":7,"confidence":2.029776674937965,"iterationTokens":462,"asi":{"hypothesis":"Excluding `ptyd` in addition to the kept `rtcd` trim might further reduce smoke-profile boot work.","rollback_reason":"The 2484ms result is obviously dominated by cache state drift rather than a fair A/B comparison, so it is not trustworthy keep evidence.","next_action_hint":"Use a direct hot-cache A/B: baseline current HEAD first, then reapply the saved `rtcd+ptyd` patch and rerun once for a fair comparison.","result":"Saved the candidate patch to `/tmp/rtcd-ptyd-smoke.patch` before discarding this confounded run.","error_detail":"Process note: multiple candidate reruns happened before logging; this discard resets the tree so the next comparison is clean."}}
{"run":118,"commit":"8ca281f","metric":8405,"metrics":{"build_ms":5775,"run_ms":2629,"image_bytes":637534208},"status":"discard","description":"Hot-cache baseline control on current HEAD (`rtcd` excluded, `ptyd` present) before reapplying the saved `rtcd+ptyd` candidate patch for a direct A/B.","timestamp":1776319556340,"segment":7,"confidence":2.0172626387176327,"iterationTokens":2346,"asi":{"hypothesis":"A direct hot-cache baseline is needed on the current kept tree before judging whether excluding `ptyd` on top of `rtcd` is a real improvement.","rollback_reason":"Control run only; no product improvement intended.","next_action_hint":"Apply `/tmp/rtcd-ptyd-smoke.patch`, rerun once under the same warmed cache conditions, and compare directly against this 8405ms baseline.","result":"Current-head hot baseline landed at total_ms=8405 with build_ms=5775 and run_ms=2629.","control_use":"Immediate A/B baseline for the `rtcd+ptyd` smoke-profile candidate."}}
{"run":119,"commit":"94eded2","metric":7847,"metrics":{"build_ms":5889,"run_ms":1958,"image_bytes":637534208},"status":"keep","description":"Keep excluding `ptyd` as well as `rtcd` from the smoke profile initfs daemon set: under a direct hot-cache A/B, the `rtcd+ptyd` profile beat the current-head baseline on total_ms by improving run_ms materially.","timestamp":1776319586531,"segment":7,"confidence":2.045,"iterationTokens":877,"asi":{"hypothesis":"The CH smoke profile does not need `ptyd` either, so excluding it on top of the kept `rtcd` trim should reduce early-boot work without breaking the smoke workload.","result":"Direct hot-cache baseline on current HEAD was 8405 / build_ms 5775 / run_ms 2629; reapplying the saved `rtcd+ptyd` patch produced 7847 / build_ms 5889 / run_ms 1958.","control_reference":"run 118 is the immediate hot-cache baseline for this A/B; earlier broader removal experiments showed `hwd` is unsafe to exclude.","reason_to_keep":"Primary metric improved under a fair same-cache comparison, the smoke workload still boots and passes normally, and the daemon appears genuinely unused for this profile.","notes":"`ptyd` removal slightly increased build_ms in this A/B but reduced run_ms enough to improve total_ms. Keep the blast radius narrow: do not combine this with `hwd` removal."}}
{"run":120,"commit":"94eded2","metric":9653,"metrics":{"build_ms":6678,"run_ms":2974,"image_bytes":637534208},"status":"discard","description":"Fresh current-head baseline before trying an on-path `bootloaderPerCrate` experiment backed by a newly generated tracked build plan.","timestamp":1776319868003,"segment":7,"confidence":2.0172626387176327,"iterationTokens":16048,"asi":{"hypothesis":"Need a clean current-head baseline on the active `rtcd+ptyd` smoke profile before introducing the missing bootloader build-plan file and wiring `mkFlatPkgs.bootloader` to `bootloaderPerCrate`.","rollback_reason":"Control run only; no product improvement intended.","next_action_hint":"Add `nix/pkgs/system/bootloader-build-plan.json`, export `bootloaderPerCrate`, wire it into `mkFlatPkgs.bootloader`, and compare directly against this baseline.","result":"Current-head baseline landed at total_ms=9653 with build_ms=6678 and run_ms=2974.","control_use":"Immediate control for the on-path bootloaderPerCrate experiment with a generated build plan."}}
{"run":121,"commit":"94eded2","metric":0,"metrics":{"build_ms":0,"run_ms":0,"image_bytes":0},"status":"crash","description":"Generating and wiring a tracked `bootloader-build-plan.json` exposed a deeper blocker in `bootloaderPerCrate`: after adding the missing plan, the on-path build still failed in the `aes` dependency with undefined `__extendhfsf2`/`__truncsfhf2` during UEFI linking.","timestamp":1776320111650,"segment":7,"confidence":2.0172626387176327,"iterationTokens":7522,"asi":{"hypothesis":"Supplying the missing `nix/pkgs/system/bootloader-build-plan.json` and a small `aes_force_soft` override might make the existing `bootloaderPerCrate` implementation buildable and let us benchmark it on the active smoke path.","rollback_reason":"The candidate still failed to build: `rust_aes-0.8.4.drv` hit linker errors for `__extendhfsf2` and `__truncsfhf2`, so `bootloaderPerCrate` is not ready for smoke benchmarking yet.","next_action_hint":"Treat `bootloaderPerCrate` as incomplete beyond the missing plan file. If revisited, investigate the UEFI per-crate toolchain/linker/compiler-builtins setup rather than only generating the plan.","error_detail":"Build log showed `rust-lld: error: undefined symbol: __extendhfsf2` and `__truncsfhf2` while building the `aes` crate for `x86_64-unknown-uefi`.","artifacts":"Generated plan was based on `nix run ../unit2nix -- --manifest-path <bootloader-src>/Cargo.toml --target x86_64-unknown-uefi --build-std core,alloc --build-std-features compiler-builtins-mem --bin bootloader`."}}
{"run":122,"commit":"94eded2","metric":8191,"metrics":{"build_ms":6103,"run_ms":2087,"image_bytes":637534208},"status":"discard","description":"Hot-cache baseline on current HEAD (`rtcd+ptyd` excluded) before testing whether excluding `ipcd` as well is safe and beneficial for the smoke profile.","timestamp":1776320165211,"segment":7,"confidence":2.0467055879899916,"iterationTokens":6236,"asi":{"hypothesis":"A direct hot-cache baseline is needed on the current kept `rtcd+ptyd` smoke profile before judging an `ipcd` exclusion candidate.","rollback_reason":"Control run only; no product improvement intended.","next_action_hint":"Exclude `ipcd` in addition to `rtcd+ptyd`, rerun once under the same warmed cache conditions, and compare directly against this baseline.","result":"Current-head hot baseline landed at total_ms=8191 with build_ms=6103 and run_ms=2087.","control_use":"Immediate A/B baseline for the `rtcd+ptyd+ipcd` smoke-profile candidate."}}
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