| commit | 06ed8f0df76e9b0256de286392d42d1ea7dec809 | [log] [tgz] |
|---|---|---|
| author | Martin Möhrmann <martisch@uos.de> | Tue Jan 06 19:48:31 2015 +0100 |
| committer | Robert Griesemer <gri@golang.org> | Thu Jan 08 20:58:26 2015 +0000 |
| tree | daa3419230a2bb46e88dd6bd211ffca14442a12b | |
| parent | db7fd1c1420d5ef2f874f40c0349b35007568c77 [diff] |
strconv: speed up atoi for common cases Add compile time constants for bases 10 and 16 instead of computing the cutoff value on every invocation of ParseUint by a division. Reduce usage of slice operations. amd64: benchmark old ns/op new ns/op delta BenchmarkAtoi 44.6 36.0 -19.28% BenchmarkAtoiNeg 44.2 38.9 -11.99% BenchmarkAtoi64 72.5 56.7 -21.79% BenchmarkAtoi64Neg 66.1 58.6 -11.35% 386: benchmark old ns/op new ns/op delta BenchmarkAtoi 86.6 73.0 -15.70% BenchmarkAtoiNeg 86.6 72.3 -16.51% BenchmarkAtoi64 126 108 -14.29% BenchmarkAtoi64Neg 126 108 -14.29% Change-Id: I0a271132120d776c97bb4ed1099793c73e159893 Reviewed-on: https://go-review.googlesource.com/2460 Reviewed-by: Robert Griesemer <gri@golang.org>
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