mirror of https://github.com/golang/go.git
65fbf0e834
Handling the ASCII case inline and call unicode.ToLower only for non-ASCII cases. Gives good improvements for the ASCII case and minor perf degrade for non-ASCII case name old time/op new time/op delta ToLower/#00 10.8ns ± 1% 9.0ns ± 1% -16.83% (p=0.008 n=5+5) ToLower/abc 23.3ns ± 4% 12.6ns ± 1% -46.01% (p=0.008 n=5+5) ToLower/AbC123 91.0ns ± 2% 70.4ns ± 0% -22.59% (p=0.008 n=5+5) ToLower/azAZ09_ 104ns ± 3% 75ns ± 1% -28.35% (p=0.008 n=5+5) ToLower/longStrinGwitHmixofsmaLLandcAps 254ns ± 4% 157ns ± 0% -38.19% (p=0.016 n=5+4) ToLower/LONGⱯSTRINGⱯWITHⱯNONASCIIⱯCHARS 446ns ± 1% 451ns ± 1% ~ (p=0.056 n=5+5) ToLower/ⱭⱭⱭⱭⱭ 345ns ± 1% 348ns ± 0% +0.93% (p=0.016 n=5+5) name old alloc/op new alloc/op delta ToLower/#00 0.00B 0.00B ~ (all equal) ToLower/abc 0.00B 0.00B ~ (all equal) ToLower/AbC123 16.0B ± 0% 16.0B ± 0% ~ (all equal) ToLower/azAZ09_ 24.0B ± 0% 16.0B ± 0% -33.33% (p=0.008 n=5+5) ToLower/longStrinGwitHmixofsmaLLandcAps 80.0B ± 0% 64.0B ± 0% -20.00% (p=0.008 n=5+5) ToLower/LONGⱯSTRINGⱯWITHⱯNONASCIIⱯCHARS 96.0B ± 0% 96.0B ± 0% ~ (all equal) ToLower/ⱭⱭⱭⱭⱭ 48.0B ± 0% 48.0B ± 0% ~ (all equal) Ran on a machine with Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz Fixes #17859 Change-Id: Iacc1e6b77e1aedba9447a6e94352606f131ea597 Reviewed-on: https://go-review.googlesource.com/76470 Reviewed-by: Marvin Stenger <marvin.stenger94@gmail.com> Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com> |
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