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      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