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{})
// 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{})