Initial triage report template.

Author: pnkfelix

triage/2024-09-23.md

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+# 2024-09-23 Triage Log
+
+TODO: Summary
+
+Triage done by **@???**.
+Revision range: [170d6cb8..749f80ab](https://perf.rust-lang.org/?start=170d6cb845c8c3f0dcec5cdd4210df9ecf990244&end=749f80ab051aa0b3724b464130440b0e70a975ac&absolute=false&stat=instructions%3Au)
+
+**Summary**:
+
+| (instructions:u)                   | mean  | range          | count |
+|:----------------------------------:|:-----:|:--------------:|:-----:|
+| Regressions ❌ <br /> (primary)    | 0.7%  | [0.2%, 2.5%]   | 8     |
+| Regressions ❌ <br /> (secondary)  | 1.2%  | [0.1%, 3.2%]   | 4     |
+| Improvements ✅ <br /> (primary)   | -0.3% | [-0.4%, -0.3%] | 9     |
+| Improvements ✅ <br /> (secondary) | -0.9% | [-1.7%, -0.2%] | 23    |
+| All ❌✅ (primary)                 | 0.2%  | [-0.4%, 2.5%]  | 17    |
+
+
+1 Regression, 0 Improvements, 4 Mixed; 1 of them in rollups
+28 artifact comparisons made in total
+
+#### Regressions
+
+Remove semi-nondeterminism of `DefPathHash` ordering from inliner [#130455](https://github.com/rust-lang/rust/pull/130455) [(Comparison Link)](https://perf.rust-lang.org/compare.html?start=2e367d94f05f3c6170f4d49f5e387cfaa0c42c32&end=46b0f8bafcf11fa1d6b6c172f4f5c1b95c11ebdb&stat=instructions:u)
+
+| (instructions:u)                   | mean | range        | count |
+|:----------------------------------:|:----:|:------------:|:-----:|
+| Regressions ❌ <br /> (primary)    | 0.8% | [0.3%, 2.5%] | 5     |
+| Regressions ❌ <br /> (secondary)  | 0.6% | [0.1%, 1.0%] | 3     |
+| Improvements ✅ <br /> (primary)   | -    | -            | 0     |
+| Improvements ✅ <br /> (secondary) | -    | -            | 0     |
+| All ❌✅ (primary)                 | 0.8% | [0.3%, 2.5%] | 5     |
+
+
+#### Improvements
+
+
+
+#### Mixed
+
+read_volatile __rust_no_alloc_shim_is_unstable in alloc_zeroed [#130497](https://github.com/rust-lang/rust/pull/130497) [(Comparison Link)](https://perf.rust-lang.org/compare.html?start=aaed38b2a631dfc593454abf471d75d84033773e&end=7fc70f870a1d11c3b104274d3a18112996cdec9a&stat=instructions:u)
+
+| (instructions:u)                   | mean  | range          | count |
+|:----------------------------------:|:-----:|:--------------:|:-----:|
+| Regressions ❌ <br /> (primary)    | 0.5%  | [0.5%, 0.5%]   | 1     |
+| Regressions ❌ <br /> (secondary)  | -     | -              | 0     |
+| Improvements ✅ <br /> (primary)   | -0.5% | [-0.7%, -0.3%] | 2     |
+| Improvements ✅ <br /> (secondary) | -     | -              | 0     |
+| All ❌✅ (primary)                 | -0.2% | [-0.7%, 0.5%]  | 3     |
+
+
+Rollup of 9 pull requests [#130534](https://github.com/rust-lang/rust/pull/130534) [(Comparison Link)](https://perf.rust-lang.org/compare.html?start=f79a912d9edc3ad4db910c0e93672ed5c65133fa&end=a5cf8bbd4e1c8edeae08778c85c6f806dd00e853&stat=instructions:u)
+
+| (instructions:u)                   | mean  | range          | count |
+|:----------------------------------:|:-----:|:--------------:|:-----:|
+| Regressions ❌ <br /> (primary)    | 0.3%  | [0.2%, 0.3%]   | 3     |
+| Regressions ❌ <br /> (secondary)  | -     | -              | 0     |
+| Improvements ✅ <br /> (primary)   | -     | -              | 0     |
+| Improvements ✅ <br /> (secondary) | -1.1% | [-1.2%, -0.6%] | 4     |
+| All ❌✅ (primary)                 | 0.3%  | [0.2%, 0.3%]   | 3     |
+
+
+Support `char::encode_utf8` in const scenarios. [#130511](https://github.com/rust-lang/rust/pull/130511) [(Comparison Link)](https://perf.rust-lang.org/compare.html?start=df7f77811c8806f85522a38878c57fde221138c9&end=f8192ba0d00bbbc58a10c45823ba010e98ea4474&stat=instructions:u)
+
+| (instructions:u)                   | mean  | range          | count |
+|:----------------------------------:|:-----:|:--------------:|:-----:|
+| Regressions ❌ <br /> (primary)    | 0.3%  | [0.3%, 0.4%]   | 3     |
+| Regressions ❌ <br /> (secondary)  | -     | -              | 0     |
+| Improvements ✅ <br /> (primary)   | -0.4% | [-0.5%, -0.3%] | 2     |
+| Improvements ✅ <br /> (secondary) | -     | -              | 0     |
+| All ❌✅ (primary)                 | 0.0%  | [-0.5%, 0.4%]  | 5     |
+
+
+Get rid of niche selection's dependence on fields's order [#130508](https://github.com/rust-lang/rust/pull/130508) [(Comparison Link)](https://perf.rust-lang.org/compare.html?start=749f80ab051aa0b3724b464130440b0e70a975ac&end=902f2956a627bd1bd44557b7fe6427a099bf8c48&stat=instructions:u)
+
+| (instructions:u)                   | mean  | range          | count |
+|:----------------------------------:|:-----:|:--------------:|:-----:|
+| Regressions ❌ <br /> (primary)    | 0.2%  | [0.2%, 0.2%]   | 1     |
+| Regressions ❌ <br /> (secondary)  | 0.5%  | [0.2%, 0.9%]   | 3     |
+| Improvements ✅ <br /> (primary)   | -0.6% | [-0.6%, -0.6%] | 1     |
+| Improvements ✅ <br /> (secondary) | -     | -              | 0     |
+| All ❌✅ (primary)                 | -0.2% | [-0.6%, 0.2%]  | 2     |
+
+
+#### Untriaged Pull Requests
+
+- [#130649 Rollup of 6 pull requests](https://github.com/rust-lang/rust/pull/130649)
+- [#130631 Rollup of 7 pull requests](https://github.com/rust-lang/rust/pull/130631)
+- [#130534 Rollup of 9 pull requests](https://github.com/rust-lang/rust/pull/130534)
+- [#130511 Support `char::encode_utf8` in const scenarios.](https://github.com/rust-lang/rust/pull/130511)
+- [#130508 Get rid of niche selection's dependence on fields's order](https://github.com/rust-lang/rust/pull/130508)
+- [#130497 read_volatile __rust_no_alloc_shim_is_unstable in alloc_zeroed](https://github.com/rust-lang/rust/pull/130497)
+- [#130455 Remove semi-nondeterminism of `DefPathHash` ordering from inliner](https://github.com/rust-lang/rust/pull/130455)
+- [#130091 Rollup of 10 pull requests](https://github.com/rust-lang/rust/pull/130091)
+- [#129831 Rollup of 11 pull requests](https://github.com/rust-lang/rust/pull/129831)
+- [#129817 Rollup of 12 pull requests](https://github.com/rust-lang/rust/pull/129817)
+- [#129797 Try to reduce space usage in dist CI](https://github.com/rust-lang/rust/pull/129797)
+- [#129790 Bump to 1.83](https://github.com/rust-lang/rust/pull/129790)
+- [#129632 Rollup of 9 pull requests](https://github.com/rust-lang/rust/pull/129632)
+- [#129063 Apply size optimizations to panic machinery and some cold functions](https://github.com/rust-lang/rust/pull/129063)
+- [#128936 Support reading thin archives in ArArchiveBuilder](https://github.com/rust-lang/rust/pull/128936)
+- [#128443 Properly mark loop as diverging if it has no breaks](https://github.com/rust-lang/rust/pull/128443)
+- [#128357 Detect non-lifetime binder params shadowing item params](https://github.com/rust-lang/rust/pull/128357)
+- [#128301 Rollup of 3 pull requests](https://github.com/rust-lang/rust/pull/128301)
+- [#128299 Simplify the canonical clone method and the copy-like forms to copy](https://github.com/rust-lang/rust/pull/128299)
+- [#128169 Rollup of 5 pull requests](https://github.com/rust-lang/rust/pull/128169)
+- [#128155 Rollup of 8 pull requests](https://github.com/rust-lang/rust/pull/128155)
+- [#128104 Not lint pub structs without pub constructors intentionally](https://github.com/rust-lang/rust/pull/128104)
+- [#127998 Rollup of 9 pull requests](https://github.com/rust-lang/rust/pull/127998)
+- [#127865 Rollup of 8 pull requests](https://github.com/rust-lang/rust/pull/127865)
+- [#127537 Implement a first version of RFC 3525: struct target features](https://github.com/rust-lang/rust/pull/127537)
+- [#127528 Replace ASCII control chars with Unicode Control Pictures](https://github.com/rust-lang/rust/pull/127528)
+- [#127486 Rollup of 5 pull requests](https://github.com/rust-lang/rust/pull/127486)
+- [#127439 Uplift elaboration into `rustc_type_ir`](https://github.com/rust-lang/rust/pull/127439)
+- [#127172 Make `can_eq` process obligations (almost) everywhere](https://github.com/rust-lang/rust/pull/127172)
+- [#127096 Rollup of 11 pull requests](https://github.com/rust-lang/rust/pull/127096)
+
+#### Nags requiring follow up
+
+TODO: Nags
+