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| author | bors <bors@rust-lang.org> | 2021-12-16 07:58:36 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2021-12-16 07:58:36 +0000 |
| commit | a090c8659c3be0cbc7dc93c4b2c11a9cdbf8b980 (patch) | |
| tree | 51187e7cb6ee1c308e65f0ea8494c212091fa39f /compiler/rustc_codegen_llvm/src/lib.rs | |
| parent | 9e1aff82e696c0edb568656ae6b509a9ab4d6c92 (diff) | |
| parent | 67180ef056b76f5d90c2164895adbe88fa056332 (diff) | |
| download | rust-a090c8659c3be0cbc7dc93c4b2c11a9cdbf8b980.tar.gz rust-a090c8659c3be0cbc7dc93c4b2c11a9cdbf8b980.zip | |
Auto merge of #91527 - the8472:retain-opt, r=dtolnay
Optimize `vec::retain` performance This simply moves the loops into the inner function which leads to better results. ``` old: test vec::bench_retain_100000 ... bench: 203,828 ns/iter (+/- 2,101) test vec::bench_retain_iter_100000 ... bench: 63,324 ns/iter (+/- 12,305) test vec::bench_retain_whole_100000 ... bench: 42,989 ns/iter (+/- 291) new: test vec::bench_retain_100000 ... bench: 42,180 ns/iter (+/- 451) test vec::bench_retain_iter_100000 ... bench: 65,167 ns/iter (+/- 11,971) test vec::bench_retain_whole_100000 ... bench: 33,736 ns/iter (+/- 12,404) ``` Measured on x86_64-unknown-linux-gnu, Zen2 Fixes #91497
Diffstat (limited to 'compiler/rustc_codegen_llvm/src/lib.rs')
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