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Merged
merged 2 commits into from
Oct 29, 2025
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Add triage for 2025-10-27 #7191

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Add triage for 2025-10-27
panstromek Oct 27, 2025
4ca7679
Update full perf triage link to latest version
panstromek Oct 28, 2025
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21 changes: 20 additions & 1 deletion draft/2025-10-29-this-week-in-rust.md
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Expand Up @@ -141,7 +141,26 @@ If you are an event organizer hoping to expand the reach of your event, please s

### Rust Compiler Performance Triage

<!-- Perf results go here -->
Mostly negative week, coming almost entirely from adding sizedness bounds in [#142712](https://github.com/rust-lang/rust/pull/142712). Other than that, we got a nice win for async code from state transform optimization in [#147493](https://github.com/rust-lang/rust/pull/147493) and quite a few smaller improvements from codegen optimization in [#147890](https://github.com/rust-lang/rust/pull/147890).

Triage done by **@panstromek**.
Revision range: [4068bafe..23fced0f](https://perf.rust-lang.org/?start=4068bafedd8ba724e332a5221c06a6fa531a30d2&end=23fced0fcc5e0ec260d25f04a8b78b269e5e90f0&absolute=false&stat=instructions%3Au)

**Summary**:

| (instructions:u) | mean | range | count |
|:----------------------------------:|:-----:|:---------------:|:-----:|
| Regressions ❌ <br /> (primary) | 0.7% | [0.2%, 3.7%] | 113 |
| Regressions ❌ <br /> (secondary) | 0.5% | [0.1%, 1.7%] | 75 |
| Improvements ✅ <br /> (primary) | -0.4% | [-0.7%, -0.2%] | 3 |
| Improvements ✅ <br /> (secondary) | -2.3% | [-20.8%, -0.1%] | 30 |
| All ❌✅ (primary) | 0.7% | [-0.7%, 3.7%] | 116 |


2 Regressions, 2 Improvements, 7 Mixed; 2 of them in rollups
42 artifact comparisons made in total

[Full report here](https://github.com/rust-lang/rustc-perf/blob/0d28673aa9dacd2fe062baa1cd5336247f373d57/triage/2025/2025-10-27.md)

### [Approved RFCs](https://github.com/rust-lang/rfcs/commits/master)

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