# 2020-10-13 Triage Log

Overall, fairly busy week, but without major regressions that need to be
addressed.

Triage done by **@simulacrum**.
Revision range: [ea7e131435a960d154e9a5d6a9297039574ffd7d..06a079c43efb062e335e6e6c9dabd3c750619980](https://perf.rust-lang.org/?start=ea7e131435a960d154e9a5d6a9297039574ffd7d&end=06a079c43efb062e335e6e6c9dabd3c750619980&absolute=false&stat=instructions%3Au)

0 Regressions, 3 Improvements, 3 Mixed
1 mixed improvement in a rollup

#### Regressions

#### Improvements

[#73905](https://github.com/rust-lang/rust/issues/73905)
- Very large improvement in [instruction counts](https://perf.rust-lang.org/compare.html?start=5849a7eca90582ee59b67eb09548a2aa424d7f52&end=08e2d4616613716362b4b49980ff303f2b9ae654&stat=instructions:u) (up to -90.5% on `full` builds of `wf-projection-stress-65510-check`)

[#77597](https://github.com/rust-lang/rust/issues/77597)
- Moderate improvement in [instruction counts](https://perf.rust-lang.org/compare.html?start=91a79fb29ac78d057d04dbe86be13d5dcc64309a&end=e055f87cdfcac1f4da6c518a547dee459de0aa26&stat=instructions:u) (up to -3.5% on `full` builds of `match-stress-enum-debug`)

[#77793](https://github.com/rust-lang/rust/issues/77793)
- Moderate improvement in [instruction counts](https://perf.rust-lang.org/compare.html?start=bc74dd711fd154555dea3b110dfed39c4dc37bc6&end=8cc82ee340ed96099680ec1165cf5e192d658d0f&stat=instructions:u) (up to -2.3% on `full` builds of `piston-image-debug`)

#### Mixed

[#77594](https://github.com/rust-lang/rust/issues/77594)
- Very large regression in [instruction counts](https://perf.rust-lang.org/compare.html?start=5ded394553296d56bb66e925d7001ab3271979ce&end=5849a7eca90582ee59b67eb09548a2aa424d7f52&stat=instructions:u) (up to 46.0% on `full` builds of `deeply-nested-opt`)
- Moderate improvement in [instruction counts](https://perf.rust-lang.org/compare.html?start=5ded394553296d56bb66e925d7001ab3271979ce&end=5849a7eca90582ee59b67eb09548a2aa424d7f52&stat=instructions:u) (up to -1.6% on `incr-unchanged` builds of `deeply-nested-opt`)

[#77630](https://github.com/rust-lang/rust/issues/77630)
- Large improvement in [instruction counts](https://perf.rust-lang.org/compare.html?start=98edd1fbf8a68977a2a7c1312eb1ebff80515a92&end=59dafb876e125c49fca93820c5ef22da3fcb8644&stat=instructions:u) (up to -5.2% on `full` builds of `match-stress-enum-check`)
- Moderate regression in [instruction counts](https://perf.rust-lang.org/compare.html?start=98edd1fbf8a68977a2a7c1312eb1ebff80515a92&end=59dafb876e125c49fca93820c5ef22da3fcb8644&stat=instructions:u) (up to 1.6% on `full` builds of `style-servo-opt`)

[#77771](https://github.com/rust-lang/rust/issues/77771)
- Moderate improvement in [instruction counts](https://perf.rust-lang.org/compare.html?start=cae8bc1f2324e31c98cb32b8ed37032fc9cef405&end=87b71ed68b69361ab0d45653a972ad4cf7a65cba&stat=instructions:u) (up to -2.5% on `incr-patched: Job` builds of `regex-opt`)
- Moderate regression in [instruction counts](https://perf.rust-lang.org/compare.html?start=cae8bc1f2324e31c98cb32b8ed37032fc9cef405&end=87b71ed68b69361ab0d45653a972ad4cf7a65cba&stat=instructions:u) (up to 1.3% on `full` builds of `match-stress-enum-check`)

#### Nags requiring follow up

- #77594
- [#77630](https://github.com/rust-lang/rust/pull/77630#issuecomment-707713702)
