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test/fixedbugs/bug369.dir/main.go
55 строк
1 KB
Caleb Spare
testing: delay flag registration; move to an Init function
29 апр 2019, 22:54
29 апр 2019, 22:54
fbc6a97
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// Copyright 2011 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package main import ( "flag" "os" "runtime" "testing" fast "./fast" slow "./slow" ) var buf = make([]byte, 1048576) func BenchmarkFastNonASCII(b *testing.B) { for i := 0; i < b.N; i++ { fast.NonASCII(buf, 0) } } func BenchmarkSlowNonASCII(b *testing.B) { for i := 0; i < b.N; i++ { slow.NonASCII(buf, 0) } } func main() { testing.Init() os.Args = []string{os.Args[0], "-test.benchtime=100ms"} flag.Parse() rslow := testing.Benchmark(BenchmarkSlowNonASCII) rfast := testing.Benchmark(BenchmarkFastNonASCII) tslow := rslow.NsPerOp() tfast := rfast.NsPerOp() // Optimization should be good for at least 2x, but be forgiving. // On the ARM simulator we see closer to 1.5x. speedup := float64(tslow) / float64(tfast) want := 1.8 if runtime.GOARCH == "arm" { want = 1.3 } if speedup < want { // TODO(rsc): doesn't work on linux-amd64 or darwin-amd64 builders, nor on // a Lenovo x200 (linux-amd64) laptop. // println("fast:", tfast, "slow:", tslow, "speedup:", speedup, "want:", want) // println("not fast enough") // os.Exit(1) } }