go rand_test 源码
golang rand_test 代码
文件路径：/src/runtime/rand_test.go
// Copyright 2017 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 runtime_test
import (
. "runtime"
"strconv"
"testing"
)
func BenchmarkFastrand(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
Fastrand()
}
})
}
func BenchmarkFastrand64(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
Fastrand64()
}
})
}
func BenchmarkFastrandHashiter(b *testing.B) {
var m = make(map[int]int, 10)
for i := 0; i < 10; i++ {
m[i] = i
}
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
for range m {
break
}
}
})
}
var sink32 uint32
func BenchmarkFastrandn(b *testing.B) {
for n := uint32(2); n <= 5; n++ {
b.Run(strconv.Itoa(int(n)), func(b *testing.B) {
for i := 0; i < b.N; i++ {
sink32 = Fastrandn(n)
}
})
}
}
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