| commit | 3d48ae355b64957c184e220161f5efb1fe51f5ad | [log] [tgz] |
|---|---|---|
| author | Sam Arnold <sarnold64@bloomberg.net> | Sat Aug 10 12:06:50 2019 -0400 |
| committer | Robert Griesemer <gri@golang.org> | Wed Aug 28 03:23:59 2019 +0000 |
| tree | f119196086b8b990b6d34d5d178db0b74bbe450c | |
| parent | 22355d6cd2421f13e560f90e77ca04ef816456da [diff] |
strconv: Speed improvement to number parsing Run underscore validation only if we have seen underscores. Some performance results on my laptop: name old time/op new time/op delta Atof64Decimal-12 30.5ns ± 0% 23.8ns ± 0% -22.02% (p=0.016 n=5+4) Atof64Float-12 39.0ns ± 0% 28.7ns ± 0% -26.39% (p=0.002 n=6+6) Atof64FloatExp-12 64.4ns ± 1% 54.4ns ± 1% -15.65% (p=0.002 n=6+6) Atof64Big-12 115ns ± 1% 87ns ± 1% -24.45% (p=0.002 n=6+6) Atof64RandomBits-12 187ns ±14% 156ns ±19% -16.46% (p=0.032 n=6+6) Atof64RandomFloats-12 126ns ± 0% 105ns ± 1% -16.65% (p=0.000 n=6+5) Atof32Decimal-12 32.0ns ± 1% 24.0ns ± 1% -24.97% (p=0.002 n=6+6) Atof32Float-12 37.1ns ± 1% 27.0ns ± 1% -27.42% (p=0.002 n=6+6) Atof32FloatExp-12 68.4ns ± 1% 54.2ns ± 1% -20.77% (p=0.002 n=6+6) Atof32Random-12 92.0ns ± 1% 77.4ns ± 0% -15.81% (p=0.000 n=6+5) ParseInt/Pos/7bit-12 19.4ns ± 1% 13.8ns ±10% -28.94% (p=0.002 n=6+6) ParseInt/Pos/26bit-12 29.1ns ± 1% 19.8ns ± 2% -31.92% (p=0.002 n=6+6) ParseInt/Pos/31bit-12 33.1ns ± 0% 22.3ns ± 3% -32.62% (p=0.004 n=5+6) ParseInt/Pos/56bit-12 47.8ns ± 1% 30.7ns ± 1% -35.78% (p=0.004 n=6+5) ParseInt/Pos/63bit-12 51.9ns ± 1% 33.4ns ± 2% -35.49% (p=0.002 n=6+6) ParseInt/Neg/7bit-12 18.5ns ± 4% 13.4ns ± 3% -27.88% (p=0.002 n=6+6) ParseInt/Neg/26bit-12 28.4ns ± 3% 19.7ns ± 3% -30.38% (p=0.002 n=6+6) ParseInt/Neg/31bit-12 31.9ns ± 1% 21.8ns ± 2% -31.56% (p=0.002 n=6+6) ParseInt/Neg/56bit-12 46.2ns ± 0% 30.6ns ± 1% -33.73% (p=0.004 n=5+6) ParseInt/Neg/63bit-12 50.2ns ± 1% 33.2ns ± 1% -33.96% (p=0.002 n=6+6) Fixes #33330 Change-Id: I119da66457c2fbaf6e88bb90cf56417a16df8f0e Reviewed-on: https://go-review.googlesource.com/c/go/+/187957 Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org>
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