maphash_tester.go

package main

import (
	"fmt"
	"hash/maphash"
	"math/rand"
)

func main() {
	b := make([]byte, 4)
	rand.Read(b)

	s := maphash.MakeSeed()
	fmt.Println("Seed", s)

	hasher := maphash.Hash{}
	hasher.SetSeed(s)
	fmt.Println("Seed", hasher.Seed())
	hasher.Write(b)
	idSum := []byte{}
	fmt.Println("Hash", hasher.Sum(idSum))


	hasher1 := maphash.Hash{}
	hasher1.SetSeed(s)
	fmt.Println("Seed", hasher1.Seed())
	hasher1.Write(b)
	idSum1 := []byte{}
	fmt.Println("Hash", hasher1.Sum(idSum1))
}

Output:

Seed {17337154316731309817}
Seed {17337154316731309817}
Hash [113 81 246 19 106 240 236 115]
Seed {17337154316731309817}
Hash [113 81 246 19 106 240 236 115]

TLDR; Can use the seed in different hash instances, and it should give same results.