调优exmath.Round算法

[thinkeridea]

调优 exmath.Round 算法，获得接近 16% 的性能提升

$ benchstat old.txt new.txt

name old time/op new time/op delta Round-8 4.20ns ± 3% 3.50ns ± 4% -16.69% (p=0.000 n=44+49)

$ benchcmp old.txt new.txt

benchcmp is deprecated in favor of benchstat: https://pkg.go.dev/golang.org/x/perf/cmd/benchstat benchmark old ns/op new ns/op delta BenchmarkRound-8 5.50 3.55 -35.45% BenchmarkRound-8 4.50 3.49 -22.44% BenchmarkRound-8 4.45 3.47 -22.02% BenchmarkRound-8 4.35 3.57 -17.93% BenchmarkRound-8 4.56 3.45 -24.34% BenchmarkRound-8 4.84 3.47 -28.31% BenchmarkRound-8 4.19 3.46 -17.42% BenchmarkRound-8 4.16 3.47 -16.59% BenchmarkRound-8 4.16 3.48 -16.35% BenchmarkRound-8 4.17 3.48 -16.55% BenchmarkRound-8 4.16 3.46 -16.83% BenchmarkRound-8 4.18 3.48 -16.75% BenchmarkRound-8 4.19 3.48 -16.95% BenchmarkRound-8 4.23 3.47 -17.97% BenchmarkRound-8 4.18 3.56 -14.83% BenchmarkRound-8 4.23 3.71 -12.29% BenchmarkRound-8 4.14 3.60 -13.04% BenchmarkRound-8 4.18 3.62 -13.40% BenchmarkRound-8 4.19 3.58 -14.56% BenchmarkRound-8 4.30 3.59 -16.51% BenchmarkRound-8 4.27 3.53 -17.33% BenchmarkRound-8 4.25 3.47 -18.35% BenchmarkRound-8 4.29 3.46 -19.35% BenchmarkRound-8 4.24 3.47 -18.16% BenchmarkRound-8 4.23 3.57 -15.60% BenchmarkRound-8 4.16 3.47 -16.59% BenchmarkRound-8 4.23 3.56 -15.84% BenchmarkRound-8 4.24 3.58 -15.57% BenchmarkRound-8 4.19 3.48 -16.95% BenchmarkRound-8 4.22 3.46 -18.01% BenchmarkRound-8 4.19 3.48 -16.95% BenchmarkRound-8 4.23 3.46 -18.20% BenchmarkRound-8 4.17 3.47 -16.79% BenchmarkRound-8 4.25 3.63 -14.59% BenchmarkRound-8 4.17 3.47 -16.79% BenchmarkRound-8 4.14 3.46 -16.43% BenchmarkRound-8 4.21 3.46 -17.81% BenchmarkRound-8 4.15 3.47 -16.39% BenchmarkRound-8 4.23 3.44 -18.68% BenchmarkRound-8 4.18 3.48 -16.75% BenchmarkRound-8 4.17 3.46 -17.03% BenchmarkRound-8 4.20 3.47 -17.38% BenchmarkRound-8 4.33 3.47 -19.86% BenchmarkRound-8 4.19 3.47 -17.18% BenchmarkRound-8 4.17 3.48 -16.55% BenchmarkRound-8 4.18 3.52 -15.79% BenchmarkRound-8 4.17 3.49 -16.31% BenchmarkRound-8 4.19 3.47 -17.18% BenchmarkRound-8 4.17 3.47 -16.79% BenchmarkRound-8 4.16 3.57 -14.18%

[codecov[bot]]

Codecov Report

Merging #13 (d9408dd) into main (dd12918) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #13   +/-   ##
=======================================
  Coverage   90.55%   90.55%           
=======================================
  Files          24       24           
  Lines         773      773           
=======================================
  Hits          700      700           
  Misses         51       51           
  Partials       22       22           

Impacted Files	Coverage Δ
exmath/round.go	100.00% <100.00%> (ø)

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