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Only compute recursive callees once.

perf-regressionPerformance regression.Performance regression.

S-waiting-on-perfStatus: Waiting on a perf run to be completed.Status: Waiting on a perf run to be completed.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Draft (not ready).

rust-lang/rustnumber 142625

#142625 In rust-lang/rust;

· cjgillot opened on Jun 17, 2025

Inline drops in MIR

perf-regressionPerformance regression.Performance regression.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Draft (not ready).

rust-lang/rustnumber 142583

#142583 In rust-lang/rust;

· cjgillot opened on Jun 16, 2025

Cache MIR preorder traversal.

perf-regressionPerformance regression.Performance regression.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Draft (not ready).

rust-lang/rustnumber 142578

#142578 In rust-lang/rust;

· cjgillot opened on Jun 16, 2025

Pre-compute MIR CFG caches for borrowck and other analyses

perf-regressionPerformance regression.Performance regression.

S-waiting-on-reviewStatus: Awaiting review from the assignee but also interested parties.Status: Awaiting review from the assignee but also interested parties.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open (in progress).

rust-lang/rustnumber 142540

#142540 In rust-lang/rust;

· cjgillot opened on Jun 15, 2025

Remove fewer Storage calls in <code>copy_prop</code>

perf-regressionPerformance regression.Performance regression.

S-waiting-on-reviewStatus: Awaiting review from the assignee but also interested parties.Status: Awaiting review from the assignee but also interested parties.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open (in progress).

rust-lang/rustnumber 142531

#142531 In rust-lang/rust;

· ohadravid opened on Jun 15, 2025

Skip no-op drop glue

perf-regressionPerformance regression.Performance regression.

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open (in progress).

rust-lang/rustnumber 142508

#142508 In rust-lang/rust;

· Mark-Simulacrum opened on Jun 14, 2025

Perform unused assignment and unused variables lints on MIR.

A-tidyArea: The tidy toolArea: The tidy tool

perf-regressionPerformance regression.Performance regression.

S-waiting-on-reviewStatus: Awaiting review from the assignee but also interested parties.Status: Awaiting review from the assignee but also interested parties.

T-bootstrapRelevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open (in progress).

rust-lang/rustnumber 142390

#142390 In rust-lang/rust;

· cjgillot opened on Jun 12, 2025

Don't fold in Instantiate when there's nothing to fold

perf-regressionPerformance regression.Performance regression.

S-waiting-on-reviewStatus: Awaiting review from the assignee but also interested parties.Status: Awaiting review from the assignee but also interested parties.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open (in progress).

rust-lang/rustnumber 142317

#142317 In rust-lang/rust;

· compiler-errors opened on Jun 10, 2025

[perf] Cache the canonical *instantiation* of param-envs

perf-regressionPerformance regression.Performance regression.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Draft (not ready).

rust-lang/rustnumber 142316

#142316 In rust-lang/rust;

· compiler-errors opened on Jun 10, 2025

[Experiment] Build the standard library with -Csymbol-mangling-version=v0

perf-regressionPerformance regression.Performance regression.

S-waiting-on-reviewStatus: Awaiting review from the assignee but also interested parties.Status: Awaiting review from the assignee but also interested parties.

T-bootstrapRelevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)

Status: Open (in progress).

rust-lang/rustnumber 142257

#142257 In rust-lang/rust;

· wesleywiser opened on Jun 9, 2025

Fast path for WF goals in new solver

perf-regressionPerformance regression.Performance regression.

S-waiting-on-reviewStatus: Awaiting review from the assignee but also interested parties.Status: Awaiting review from the assignee but also interested parties.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

WG-trait-system-refactorThe Rustc Trait System Refactor Initiative (-Znext-solver)The Rustc Trait System Refactor Initiative (-Znext-solver)

Status: Open (in progress).

rust-lang/rustnumber 142223

#142223 In rust-lang/rust;

· compiler-errors opened on Jun 9, 2025

Test binary size of share generics

perf-regressionPerformance regression.Performance regression.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Draft (not ready).

rust-lang/rustnumber 142165

#142165 In rust-lang/rust;

· Noratrieb opened on Jun 7, 2025