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| author | Matthias Krüger <matthias.krueger@famsik.de> | 2022-02-16 18:59:29 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-02-16 18:59:29 +0100 |
| commit | 9a4212113592e83fb68ef9f347436d0d13517c1d (patch) | |
| tree | 7a1cc369ed510d6e2d68caaf5809ac753242ce66 /library/std/src/sys/unix/stack_overflow.rs | |
| parent | 01f0da2373183482148deee18e35fcad202d045e (diff) | |
| parent | 3960ce6ec5222d77a5aa1681eca36f2a59c62c1b (diff) | |
| download | rust-9a4212113592e83fb68ef9f347436d0d13517c1d.tar.gz rust-9a4212113592e83fb68ef9f347436d0d13517c1d.zip | |
Rollup merge of #93962 - joboet:branchless_slice_ord, r=Mark-Simulacrum
Make [u8]::cmp implementation branchless The current implementation generates rather ugly assembly code, branching when the common parts are equal. By performing the comparison of the lengths upfront using a subtraction, the assembly gets much prettier: https://godbolt.org/z/4e5fnEKGd. This will probably not impact speed too much, as the expensive part is in most cases the `memcmp`, but it sure looks better (I'm porting a sorting algorithm currently, and that branch just bothered me).
Diffstat (limited to 'library/std/src/sys/unix/stack_overflow.rs')
0 files changed, 0 insertions, 0 deletions