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Issues list

shared-generics: Do not share instantiations that contain local-only types perf-regression Performance regression. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#138522 opened Mar 14, 2025 by osiewicz Loading…
@nnethercote
14
expand: Leave traces when expanding cfg_attr attributes A-attributes Area: Attributes (`#[…]`, `#![…]`) perf-regression Performance regression. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#138515 opened Mar 14, 2025 by petrochenkov Loading…
@nnethercote
11
Nul terminate rust string literals perf-regression Performance regression. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#138504 opened Mar 14, 2025 by bjorn3 • Draft
@estebank
8
Avoid wrapping constant allocations in packed structs when not necessary perf-regression Performance regression. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#138503 opened Mar 14, 2025 by bjorn3 Loading…
@estebank
11
Test out a more lock-free hash map A-query-system Area: The rustc query system (https://rustc-dev-guide.rust-lang.org/query.html) perf-regression Performance regression. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#138419 opened Mar 12, 2025 by Zoxc • Draft
@Nadrieril
12
Tweak VecCache to improve performance perf-regression Performance regression. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#138405 opened Mar 12, 2025 by Zoxc Loading…
@Noratrieb
18
Deduce readonly attribute for !Freeze arguments perf-regression Performance regression. S-experimental Status: Ongoing experiment that does not require reviewing and won't be merged in its current state. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#138154 opened Mar 7, 2025 by tmiasko • Draft
27
Use multiple returns in MIR if it saves a block; still have only one in LLVM perf-regression Performance regression. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#138144 opened Mar 7, 2025 by scottmcm • Draft
6
Ensure constants are WF before calling into CTFE perf-regression Performance regression. PG-exploit-mitigations Project group: Exploit mitigations S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. WG-trait-system-refactor The Rustc Trait System Refactor Initiative (-Znext-solver)
#137972 opened Mar 4, 2025 by BoxyUwU • Draft
4
41
Sized Hierarchy A-attributes Area: Attributes (`#[…]`, `#![…]`) A-run-make Area: port run-make Makefiles to rmake.rs A-rustdoc-json Area: Rustdoc JSON backend A-rustdoc-search Area: Rustdoc's search feature perf-regression Performance regression. PG-exploit-mitigations Project group: Exploit mitigations S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-lang Relevant to the language team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue. T-rustdoc-frontend Relevant to the rustdoc-frontend team, which will review and decide on the web UI/UX output. WG-trait-system-refactor The Rustc Trait System Refactor Initiative (-Znext-solver)
#137944 opened Mar 3, 2025 by davidtwco Loading…
1
@fee1-dead
84
Reserve before write_fmt for owned buffers perf-regression Performance regression. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#137762 opened Feb 28, 2025 by thaliaarchi • Draft
@workingjubilee
42
Experiment: New format_args!() representation A-fmt Area: `core::fmt` perf-regression Performance regression. S-experimental Status: Ongoing experiment that does not require reviewing and won't be merged in its current state. S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#137294 opened Feb 19, 2025 by m-ou-se • Draft
@m-ou-se
14
Stabilize query cache size by fixing encoding order of some query results A-query-system Area: The rustc query system (https://rustc-dev-guide.rust-lang.org/query.html) perf-regression Performance regression. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#137196 opened Feb 17, 2025 by saethlin • Draft
10
Use Peekable in lexer_unescape perf-regression Performance regression. S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#136919 opened Feb 12, 2025 by hkBst • Draft
@nnethercote
9
[experiment] dont init anything except x86 perf-regression Performance regression. S-experimental Status: Ongoing experiment that does not require reviewing and won't be merged in its current state. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#136861 opened Feb 11, 2025 by klensy Loading…
8
GCI: At their def site, actually wfcheck the where-clause & always eval free lifetime-generic constants F-generic_const_items `#![feature(generic_const_items)]` perf-regression Performance regression. S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#136429 opened Feb 2, 2025 by fmease • Draft
@compiler-errors
21
Remove InstanceKind::generates_cgu_internal_copy perf-regression Performance regression. perf-regression-triaged The performance regression has been triaged. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#136410 opened Feb 1, 2025 by saethlin Loading…
@estebank
29
Lazy-chunk Symbol interner perf-regression Performance regression. S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#136401 opened Feb 1, 2025 by Mark-Simulacrum Loading…
45
[DO NOT MERGE] perf run for rustc-hash candidate (folded multiply) A-rustdoc-json Area: Rustdoc JSON backend A-tidy Area: The tidy tool perf-regression Performance regression. S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.
#136095 opened Jan 26, 2025 by orlp Loading…
@Mark-Simulacrum
24
stop specializing on Copy perf-regression Performance regression. S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.
#135634 opened Jan 17, 2025 by joboet Loading…
1
@Mark-Simulacrum
28
Include arguments to the precondition check in failure messages perf-regression Performance regression. S-experimental Status: Ongoing experiment that does not require reviewing and won't be merged in its current state. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#134938 opened Dec 30, 2024 by saethlin • Draft
18
Do partial SsaLocals analysis in unoptimized builds A-run-make Area: port run-make Makefiles to rmake.rs perf-regression Performance regression. S-experimental Status: Ongoing experiment that does not require reviewing and won't be merged in its current state. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#134051 opened Dec 9, 2024 by saethlin • Draft
22
Lower BinOp::Cmp to llvm.{s,u}cmp.* intrinsics perf-regression Performance regression. S-blocked Status: Blocked on something else such as an RFC or other implementation work. S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#133984 opened Dec 6, 2024 by DaniPopes Loading…
@scottmcm
46
Consider fields to be inhabited if they are unstable disposition-merge This issue / PR is in PFCP or FCP with a disposition to merge it. finished-final-comment-period The final comment period is finished for this PR / Issue. I-lang-easy-decision Issue: The decision needed by the team is conjectured to be easy; this does not imply nomination perf-regression Performance regression. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-lang Relevant to the language team, which will review and decide on the PR/issue.
#133889 opened Dec 5, 2024 by compiler-errors Loading…
1
@Nadrieril
35
Use iter::repeat_n to implement Vec::extend_with perf-regression Performance regression. S-blocked Status: Blocked on something else such as an RFC or other implementation work. T-libs Relevant to the library team, which will review and decide on the PR/issue.
#133662 opened Nov 30, 2024 by paolobarbolini Loading…
@Noratrieb
17
ProTip! Exclude everything labeled bug with -label:bug.