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[DO NOT MERGE] Area: Attributes (`#[…]`, `#![…]`) A-compiletest Area: The compiletest test runner A-query-system Area: The rustc query system (https://rustc-dev-guide.rust-lang.org/query.html) A-run-make Area: port run-make Makefiles to rmake.rs A-testsuite Area: The testsuite used to check the correctness of rustc A-tidy Area: The tidy tool 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-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-clippy Relevant to the Clippy team. T-compiler Relevant to the compiler 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)
-Znext-solver=globally experiments A-attributes Start using pattern types in libcore A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-test-infra-minicore Area: `minicore` test auxiliary and `//@ add-core-stubs` O-unix Operating system: Unix-like O-wasi Operating system: Wasi, Webassembly System Interface O-wasm Target: WASM (WebAssembly), http://webassembly.org/ 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-clippy Relevant to the Clippy team. T-libs Relevant to the library team, which will review and decide on the PR/issue. T-rustfmt Relevant to the rustfmt team, which will review and decide on the PR/issue.
#136006 opened Jan 24, 2025 by oli-obk Loading…
Extend GVN to perform local value numbering. A-mir-opt-GVN Area: MIR opt Global Value Numbering (GVN) 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.
Add inline(usually) A-attributes Area: Attributes (`#[…]`, `#![…]`) 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.
Try enabling precondition checks on ptr::{read,write} 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-libs Relevant to the library team, which will review and decide on the PR/issue.
[WIP] rewrite TrustedRandomAccess into two directional variants 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.
Ensure constants are WF before calling into CTFE 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-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)
Infer nounwind and use it in MIR opts 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.
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. S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-libs Relevant to the library team, which will review and decide on the PR/issue.
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 • Draft
[perf] Decouple directly accessing a HIR owner from ast lowering A-query-system Area: The rustc query system (https://rustc-dev-guide.rust-lang.org/query.html) 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.
Expand assumes to the other unchecked slice ops 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.
[TOY] Run MIR opts before coroutine state transform 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.
Support symbolicating zstd-compressed ELF sections A-testsuite Area: The testsuite used to check the correctness of rustc 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-libs Relevant to the library team, which will review and decide on the PR/issue.
#130417 opened Sep 15, 2024 by workingjubilee • Draft
[EXPERIMENT] Introduce 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. WG-trait-system-refactor The Rustc Trait System Refactor Initiative (-Znext-solver)
TypingMode::Codegen to avoid layout cycles perf-regression wip tcmalloc 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-clippy Relevant to the Clippy team. 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.
#147333 opened Oct 4, 2025 by 0xdeafbeef Loading…
Check for occupied niches 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. T-libs Relevant to the library team, which will review and decide on the PR/issue.
Dogfood Area: The testsuite used to check the correctness of rustc 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)
-Zno-embed-metadata in the compiler A-testsuite Make lowering incremental, take 3/N 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-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.
Remove Area: rustc-dev-guide 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-clippy Relevant to the Clippy team. 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.
box_new intrinsic A-rustc-dev-guide EXPERIMENT: Use the force-inline pass for more stuff A-attributes Area: Attributes (`#[…]`, `#![…]`) A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. 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.
no wf obligations in generalize 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.
[DO NOT MERGE] Experimentally force non-leaf frame pointers 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.
#115521 opened Sep 3, 2023 by workingjubilee Loading…
[DO NOT MERGE] build Enzyme as archive A-testsuite Area: The testsuite used to check the correctness of rustc F-autodiff `#![feature(autodiff)]` perf-regression Performance regression. S-experimental Status: Ongoing experiment that does not require reviewing and won't be merged in its current state. 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-infra Relevant to the infrastructure team, which will review and decide on the PR/issue.
#140799 opened May 8, 2025 by ZuseZ4 Loading…
Avoid 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.
LocalCopy instantiation for #[inline] on -Copt-level=0 perf-regression Previous Next
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