Lehmer random bytes slice generator

lehmer.go

package main

import (
	"fmt"
	"time"
)

func main() {
	seed := uint64(time.Now().UnixNano())
	p := make([]byte, 128)

	for i := 0; i < 2; i++ {
		seed = LehmerRand(seed, p)
		fmt.Println(p)
	}
}

// LehmerRand generates pseudo random bytes.
// See https://en.wikipedia.org/wiki/Lehmer_random_number_generator
func LehmerRand(seed uint64, p []byte) uint64 {
	for i := 0; i < len(p); i++ {
		// Like `seed = seed * 48271 % 2147483647` but 64% speedup
		seed *= 48271
		seed = (seed & 0x7fffffff) + (seed >> 31)
		p[i] = byte(seed)
	}
	return seed
}