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(EXPERIMENT) Make ChunkedBitSet's <code>bitwise_changes</code> more unroller/autovectorizer-friendly

S-experimentalStatus: Ongoing experiment that does not require reviewing and won't be merged in its current state.Status: Ongoing experiment that does not require reviewing and won't be merged in its current state.

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 147801

#147801 In rust-lang/rust;

· Zalathar opened on Oct 17, 2025

[DONT MERGE] Doc attr based on master

A-attributesArea: Attributes (`#[…]`, `#![…]`)Area: Attributes (`#[…]`, `#![…]`)

S-experimentalStatus: Ongoing experiment that does not require reviewing and won't be merged in its current state.Status: Ongoing experiment that does not require reviewing and won't be merged in its current state.

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 147097

#147097 In rust-lang/rust;

· jdonszelmann opened on Sep 27, 2025

[Experiment] Do not emit noalias for some functions including <code>.as_mut_ptr()</code>

S-experimentalStatus: Ongoing experiment that does not require reviewing and won't be merged in its current state.Status: Ongoing experiment that does not require reviewing and won't be merged in its current state.

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 146823

#146823 In rust-lang/rust;

· HKalbasi opened on Sep 20, 2025

[DO NOT MERGE OR REVIEW] Early perf experiments

S-experimentalStatus: Ongoing experiment that does not require reviewing and won't be merged in its current state.Status: Ongoing experiment that does not require reviewing and won't be merged in its current state.

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

T-rustdoc-frontendRelevant to the rustdoc-frontend team, which will review and decide on the web UI/UX output.Relevant to the rustdoc-frontend team, which will review and decide on the web UI/UX output.

Status: Draft (not ready).

rust-lang/rustnumber 146483

#146483 In rust-lang/rust;

· fmease opened on Sep 12, 2025

Disable incr CGU merging

perf-regressionPerformance regression.Performance regression.

S-experimentalStatus: Ongoing experiment that does not require reviewing and won't be merged in its current state.Status: Ongoing experiment that does not require reviewing and won't be merged in its current state.

S-waiting-on-authorStatus: This is awaiting some action (such as code changes or more information) from the author.Status: This is awaiting some action (such as code changes or more information) from the author.

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 146146

#146146 In rust-lang/rust;

· saethlin opened on Sep 3, 2025

rustdoc: [PoC] [WIP] Don't render keyword <code>Self</code> as <code>SelfTy</code>

A-attributesArea: Attributes (`#[…]`, `#![…]`)Area: Attributes (`#[…]`, `#![…]`)

A-rustdoc-jsonArea: Rustdoc JSON backendArea: Rustdoc JSON backend

A-rustdoc-searchArea: Rustdoc's search featureArea: Rustdoc's search feature

rla-silencedSilences rust-log-analyzer postings to the PR it's added on.Silences rust-log-analyzer postings to the PR it's added on.

S-experimentalStatus: Ongoing experiment that does not require reviewing and won't be merged in its current state.Status: Ongoing experiment that does not require reviewing and won't be merged in its current state.

S-waiting-on-authorStatus: This is awaiting some action (such as code changes or more information) from the author.Status: This is awaiting some action (such as code changes or more information) from the author.

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

T-rustdoc-frontendRelevant to the rustdoc-frontend team, which will review and decide on the web UI/UX output.Relevant to the rustdoc-frontend team, which will review and decide on the web UI/UX output.

Status: Draft (not ready).

rust-lang/rustnumber 145806

#145806 In rust-lang/rust;

· fmease opened on Aug 24, 2025

Experiment: Add <code>where T: Default</code> to <code>Default for [T; 0]</code> impl.

S-experimentalStatus: Ongoing experiment that does not require reviewing and won't be merged in its current state.Status: Ongoing experiment that does not require reviewing and won't be merged in its current state.

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

Status: Draft (not ready).

rust-lang/rustnumber 145457

#145457 In rust-lang/rust;

· m-ou-se opened on Aug 15, 2025

Add <code>Drop::pin_drop</code> for pinned drops

S-experimentalStatus: Ongoing experiment that does not require reviewing and won't be merged in its current state.Status: Ongoing experiment that does not require reviewing and won't be merged in its current state.

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.

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

Status: Draft (not ready).

rust-lang/rustnumber 144537

#144537 In rust-lang/rust;

· frank-king opened on Jul 27, 2025

Validate transmute in CTFE

perf-regressionPerformance regression.Performance regression.

S-experimentalStatus: Ongoing experiment that does not require reviewing and won't be merged in its current state.Status: Ongoing experiment that does not require reviewing and won't be merged in its current state.

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 144030

#144030 In rust-lang/rust;

· oli-obk opened on Jul 16, 2025

[crater] Add <code>impl From&lt;f16&gt; for f32</code>

S-experimentalStatus: Ongoing experiment that does not require reviewing and won't be merged in its current state.Status: Ongoing experiment that does not require reviewing and won't be merged in its current state.

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.

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

Status: Draft (not ready).

rust-lang/rustnumber 142723

#142723 In rust-lang/rust;

· beetrees opened on Jun 19, 2025

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

perf-regressionPerformance regression.Performance regression.

S-experimentalStatus: Ongoing experiment that does not require reviewing and won't be merged in its current state.Status: Ongoing experiment that does not require reviewing and won't be merged in its current state.

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

[DO NOT MERGE] Crate local distributed slice

S-experimentalStatus: Ongoing experiment that does not require reviewing and won't be merged in its current state.Status: Ongoing experiment that does not require reviewing and won't be merged in its current state.

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.

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

Status: Draft (not ready).

rust-lang/rustnumber 141830

#141830 In rust-lang/rust;

· jdonszelmann opened on May 31, 2025