50 строки
1,1 КиБ
Go
50 строки
1,1 КиБ
Go
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package testing_test
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import (
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"testing"
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)
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var buf = make([]byte, 13579)
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func NonASCII(b []byte, i int, offset int) int {
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for i = offset; i < len(b)+offset; i++ {
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if b[i%len(b)] >= 0x80 {
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break
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}
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}
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return i
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}
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func BenchmarkFastNonASCII(b *testing.B) {
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var val int
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for i := 0; i < b.N; i++ {
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val += NonASCII(buf, 0, 0)
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}
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}
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func BenchmarkSlowNonASCII(b *testing.B) {
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var val int
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for i := 0; i < b.N; i++ {
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val += NonASCII(buf, 0, 0)
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val += NonASCII(buf, 0, 1)
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}
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}
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// TestBenchmark simply uses Benchmark twice and makes sure it does not crash.
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func TestBenchmark(t *testing.T) {
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// FIXME: reduce runtime from the current 3 seconds.
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rslow := testing.Benchmark(BenchmarkSlowNonASCII)
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rfast := testing.Benchmark(BenchmarkFastNonASCII)
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tslow := rslow.NsPerOp()
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tfast := rfast.NsPerOp()
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// Be exceedingly forgiving; do not fail even if system gets busy.
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speedup := float64(tslow) / float64(tfast)
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if speedup < 0.3 {
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t.Errorf("Expected speedup >= 0.3, got %f", speedup)
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}
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}
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