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| author | bors <bors@rust-lang.org> | 2023-08-08 10:25:37 +0000 |
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| committer | bors <bors@rust-lang.org> | 2023-08-08 10:25:37 +0000 |
| commit | 617821ab32b7a7563f561812385e2fba7b1d2981 (patch) | |
| tree | 759ff3b9e768633cdcd660eae2d78f2652755f4a /compiler/rustc_codegen_llvm/src | |
| parent | 6d55184d05c9bd3c46b294dcad3bfb1d0907e871 (diff) | |
| parent | 64dfd1090d20d112038fecad7fcd2b988e372442 (diff) | |
| download | rust-617821ab32b7a7563f561812385e2fba7b1d2981.tar.gz rust-617821ab32b7a7563f561812385e2fba7b1d2981.zip | |
Auto merge of #114339 - ttsugriy:unsafe-utf8, r=davidtwco
[rustc_data_structures][base_n][perf] Remove unnecessary utf8 check. Since all output characters taken from `BASE_64` are valid UTF8 chars there is no need to waste cycles on validation. Even though it's obviously a perf win, I've also used a [benchmark](https://gist.github.com/ttsugriy/e1e63c07927d8f31e71695a9c617bbf3) on M1 MacBook Air with following results: ``` Running benches/base_n_benchmark.rs (target/release/deps/base_n_benchmark-825fe5895b5c2693) push_str/old time: [14.670 µs 14.852 µs 15.074 µs] Found 11 outliers among 100 measurements (11.00%) 4 (4.00%) high mild 7 (7.00%) high severe push_str/new time: [12.573 µs 12.674 µs 12.801 µs] Found 11 outliers among 100 measurements (11.00%) 7 (7.00%) high mild 4 (4.00%) high severe ```
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