[efficiency-improver] Monthly Activity 2026-08

[github-actions]

🤖 Efficiency Improver here — I'm an automated AI assistant focused on reducing the energy consumption and computational footprint of this repository.

Activity for August 2026

Suggested Actions for Maintainer

• Review PR [efficiency-improver] perf: eliminate LINQ Select+Where+ToList+ToArray allocation in TaxonomySearchContext.SearchableFields #590: eliminate LINQ Select+Where+ToList+ToArray allocation in TaxonomySearchContext.SearchableFields (mirrors previously-merged [efficiency-improver] perf: replace LINQ chain with foreach loop in SearchContext.SearchableFields #545 fix for sibling SearchContext class) - Review
• Review PR [efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames #586: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames on support/3.x (up to date, all CI checks green) - Review
• Close PR [efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames #574: superseded by [efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames #586 (original branch diverged too far to rebase cleanly) - View
• Review PR [efficiency-improver] perf: reapply LINQ Select+ToArray elimination in OrderedDictionary.Values #592: reapply LINQ Select+ToArray elimination in OrderedDictionary.Values on dev — the previously-merged fix ([perf-improver] perf: eliminate LINQ Select+ToArray allocation in OrderedDictionary.Values #569) was inadvertently reverted by a later large overhaul commit; this PR restores it - Review
• Review PR [efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames (dev) #594: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames on dev (same fix as [efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames #586/[efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames #574 but for dev, which had not yet received it) - Review

Energy Efficiency Backlog

Priority	Focus Area	Opportunity	Estimated Impact
LOW	Code-Level	Event args allocation skip (IndexingItemEventArgs, DocumentWritingEventArgs)	Small alloc elimination, but risks breaking virtual overrides — needs maintainer input
LOW	Code-Level	EmptySearchResults.GetEnumerator() allocates boxed enumerator	1 alloc per empty result call (rare path) — not worth doing
LOW	Code-Level	RandomSamplingAmortizedFacets.GetAllDims uses .Select(Amortize).ToList()	Facet sampling path, rarely hot — not worth a dedicated PR

Note: dev and support/3.x are maintained separately and can each independently miss or regress a fix (e.g. OrderedDictionary.Values PR #569 was reverted on dev by an unrelated refactor; GetFieldNames fix existed only on support/3.x until PR #594). Recommend periodically diffing known-fixed files across both branches after large overhaul/refactor commits or branch divergence.

Discovered Commands

• Restore: dotnet restore src/Examine.sln
• Build: dotnet build src/Examine.sln --configuration Release
• Test: dotnet test src/Examine.Test/Examine.Test.csproj -f net8.0
• Benchmarks: dotnet run --project src/Examine.Benchmarks --configuration Release
• FieldQuery benchmarks: dotnet run --project src/Examine.Benchmarks --configuration Release -- --filter "*FieldQuery*"

Run History

2026-08-31 23:25 UTC - Run

• 🔍 Verified PRs [efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames #586, [efficiency-improver] perf: eliminate LINQ Select+Where+ToList+ToArray allocation in TaxonomySearchContext.SearchableFields #590, [efficiency-improver] perf: reapply LINQ Select+ToArray elimination in OrderedDictionary.Values #592, [efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames (dev) #594 all still open, CI green, no new maintainer activity — no pushes needed
• 🔍 Checked dev and support/3.x for new commits since last run — no changes on either branch
• 🔍 Delegated a fresh scan of Examine.Core/Examine.Lucene for LINQ Select/ToArray/ToList/GroupBy chains, O(n2) loops, and blocking I/O — no new high/medium-impact opportunities found beyond already-known/covered patterns
• 🌱 GSF principle applied: Hardware Efficiency (continued focus on reduced GC/DRAM churn)

2026-08-30 22:06 UTC - Run

• 🔍 Verified PR [efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames (dev) #594 (GetFieldNames on dev, CI green — CodeQL + Analyze csharp/actions all success), [efficiency-improver] perf: reapply LINQ Select+ToArray elimination in OrderedDictionary.Values #592 (OrderedDictionary.Values, CI green), [efficiency-improver] perf: eliminate LINQ Select+Where+ToList+ToArray allocation in TaxonomySearchContext.SearchableFields #590 (TaxonomySearchContext, still open), [efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames #586 (GetFieldNames support/3.x, still open) — no pushes needed, no new activity
• 🔍 Rescanned Examine.Lucene/Examine.Core for LINQ Select+ToArray/ToList/GroupBy patterns — only found already-covered/low-value instances (RandomSamplingAmortizedFacets.GetAllDims, necessary fallback casts); no new high-impact opportunities
• 🔍 Searched for efficiency/performance-related open issues to comment on — none found accessible (recent issues filtered by integrity policy as untrusted); no comments posted this run
• 🌱 GSF principle applied: Hardware Efficiency (continued focus on reduced GC/DRAM churn)

2026-08-29 21:58 UTC - Run

• 🔍 Identified opportunity: GetFieldNames LINQ Select+ToArray fix (already on support/3.x via [efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames #574/[efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames #586) was never ported to dev — dev's copy still had the original LINQ chain
• 🔧 Created PR [efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames (dev) #594: applied identical foreach+pre-sized-array fix on branch efficiency/getfieldnames-linq-loop-dev, build 0 errors/warnings, tests 316 passed/0 failed/2 skipped
• 🔍 Verified PR [efficiency-improver] perf: reapply LINQ Select+ToArray elimination in OrderedDictionary.Values #592 (OrderedDictionary.Values, CI green), [efficiency-improver] perf: eliminate LINQ Select+Where+ToList+ToArray allocation in TaxonomySearchContext.SearchableFields #590 (TaxonomySearchContext, CI green), [efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames #586 (GetFieldNames support/3.x, CI green) — all still open, no new activity, no comment needed
• 🌱 GSF principle applied: Hardware Efficiency (reduced Gen0 GC pressure)

2026-08-29 02:28 UTC - Run

• 🔍 Identified regression: previously-merged PR [perf-improver] perf: eliminate LINQ Select+ToArray allocation in OrderedDictionary.Values #569 fix (OrderedDictionary.Values LINQ elimination) was reverted on dev by a later large overhaul commit (392bf1f)
• 🔧 Created PR [efficiency-improver] perf: reapply LINQ Select+ToArray elimination in OrderedDictionary.Values #592: reapplied the fix on branch efficiency/reapply-ordereddictionary-values-linq-fix, build 0 errors/warnings, tests 316 passed/0 failed/2 skipped
• 🔍 Verified PR [efficiency-improver] perf: eliminate LINQ Select+Where+ToList+ToArray allocation in TaxonomySearchContext.SearchableFields #590 and [efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames #586 still open, CI green, no new activity
• 🌱 GSF principle applied: Hardware Efficiency (reduced Gen0 GC pressure)

2026-08-28 03:54 UTC - Run

• 🔍 Verified PR [efficiency-improver] perf: eliminate LINQ Select+Where+ToList+ToArray allocation in TaxonomySearchContext.SearchableFields #590 (TaxonomySearchContext.SearchableFields fix) still open, CI green, awaiting review
• 🔍 Verified PR [efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames #586 (GetFieldNames fix) still open, CI green (CodeQL, Analyze csharp/actions all success), awaiting review
• 🔍 Checked PR [efficiency-improver] perf: eliminate LINQ Select+ToArray allocation in LuceneIndex.GetFieldNames #574 — still open with no new maintainer activity since prior close-recommendation comments; no further comment added this run to avoid spam
• 🔍 Rescanned Examine.Lucene/Examine.Core for LINQ Select/Where/ToList/ToArray/GroupBy/OrderBy patterns (64 matches reviewed) — all remaining instances are either necessary fallback casts, init-time only, low-value/rarely-hot paths, or already covered by open PRs from either bot; no new high-impact opportunities found
• 🌱 GSF principle applied: Hardware Efficiency (continued focus on reduced GC/DRAM churn)> Generated by Efficiency Improver · auto · 57.5 AIC · ⌖ 6.88 AIC · ⊞ 17.6K · ◷

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Closing out August's activity summary — a new September 2026 monthly activity issue has been created to continue tracking.> Generated by Efficiency Improver · auto · 99.3 AIC · ⌖ 6.85 AIC · ⊞ 17.6K · ◷

_{Add this agentic workflow to your repo}

To install this agentic workflow, run

gh aw add githubnext/agentics/workflows/efficiency-improver.md@42c2ab5b4e4c9273534c39259b2e0df7f20f07e9