Beispiel #1
0
	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		total += rnd.Next() + rnd.Next()
	}
}

func BenchmarkRand(b *testing.B) {

	r := rand.New(rand.NewSource(0x0ddc0ffeebadf00d))

	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		total += uint32(r.Int31())
	}
}
func BenchmarkXorshift(b *testing.B) {

	r := xorshift.NewXorShift64Star(0x0ddc0ffeebadf00d)

	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		total += uint32(r.Next())
	}
}

var _ = rand.Source(&Rand{})
Beispiel #2
0
// Package crandsrc provides a source for math/rand via crypto/rand
package crandsrc

import (
	crand "crypto/rand"
	"encoding/binary"
	mrand "math/rand"
)

type Source struct{}

func (s Source) Int63() int64 {
	var b [8]byte
	_, err := crand.Read(b[:])
	if err != nil {
		// :(
		panic("no crypto source")
	}
	return int64(binary.LittleEndian.Uint64(b[:])) & 0x7fffffffffffffff
}

func (r Source) Seed(s int64) {
	// ignored
}

var _ = mrand.Source(Source{})