| commit | a1f7dbf0aa5c9c7bd6677c53d68aa991e4b18797 | [log] [tgz] |
|---|---|---|
| author | Rémy Oudompheng <remyoudompheng@gmail.com> | Sun Jan 13 18:10:19 2019 +0100 |
| committer | Robert Griesemer <gri@golang.org> | Mon Mar 04 22:25:21 2019 +0000 |
| tree | 738f22ff15824067ae81d376633c99dc709bcb61 | |
| parent | d5edbcac9857cd77723f153d03c55c87923d714f [diff] |
strconv: simplify (*extFloat).Multiply using math/bits.Mul64 This method was using a handwritten long multiplication of uint64s. Since implementation of #24813 we can remove it and replace it by Mul64 from math/bits. This brings a small speedup for 64-bit platforms. Benchmarks on Haswell Celeron 2955U. benchmark old ns/op new ns/op delta BenchmarkAppendFloat/Decimal-2 127 127 +0.00% BenchmarkAppendFloat/Float-2 340 317 -6.76% BenchmarkAppendFloat/Exp-2 258 233 -9.69% BenchmarkAppendFloat/NegExp-2 256 231 -9.77% BenchmarkAppendFloat/Big-2 402 375 -6.72% BenchmarkAppendFloat/BinaryExp-2 113 114 +0.88% BenchmarkAppendFloat/32Integer-2 125 125 +0.00% BenchmarkAppendFloat/32ExactFraction-2 274 249 -9.12% BenchmarkAppendFloat/32Point-2 339 317 -6.49% BenchmarkAppendFloat/32Exp-2 255 229 -10.20% BenchmarkAppendFloat/32NegExp-2 254 229 -9.84% BenchmarkAppendFloat/64Fixed1-2 165 154 -6.67% BenchmarkAppendFloat/64Fixed2-2 184 176 -4.35% BenchmarkAppendFloat/64Fixed3-2 168 158 -5.95% BenchmarkAppendFloat/64Fixed4-2 187 177 -5.35% BenchmarkAppendFloat/Slowpath64-2 84977 84883 -0.11% Change-Id: If05784e856289b3b7bf136567882e7ee10234756 Reviewed-on: https://go-review.googlesource.com/c/go/+/157717 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org>
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