rand_test.go

Documentation: runtime

		 1  // Copyright 2017 The Go Authors. All rights reserved.
		 2  // Use of this source code is governed by a BSD-style
		 3  // license that can be found in the LICENSE file.
		 4  
		 5  package runtime_test
		 6  
		 7  import (
		 8  	. "runtime"
		 9  	"strconv"
		10  	"testing"
		11  )
		12  
		13  func BenchmarkFastrand(b *testing.B) {
		14  	b.RunParallel(func(pb *testing.PB) {
		15  		for pb.Next() {
		16  			Fastrand()
		17  		}
		18  	})
		19  }
		20  
		21  func BenchmarkFastrandHashiter(b *testing.B) {
		22  	var m = make(map[int]int, 10)
		23  	for i := 0; i < 10; i++ {
		24  		m[i] = i
		25  	}
		26  	b.RunParallel(func(pb *testing.PB) {
		27  		for pb.Next() {
		28  			for range m {
		29  				break
		30  			}
		31  		}
		32  	})
		33  }
		34  
		35  var sink32 uint32
		36  
		37  func BenchmarkFastrandn(b *testing.B) {
		38  	for n := uint32(2); n <= 5; n++ {
		39  		b.Run(strconv.Itoa(int(n)), func(b *testing.B) {
		40  			for i := 0; i < b.N; i++ {
		41  				sink32 = Fastrandn(n)
		42  			}
		43  		})
		44  	}
		45  }
		46
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