Benchmark sync.Map vs regular map for Stores

store_bench.go

func nrand(n int) []int {
	i := make([]int, n)
	for ind := range i {
		i[ind] = rand.Int()
	}
	return i
}

func BenchmarkStoreRegular(b *testing.B) {
	nums := nrand(b.N)
	rm := NewRegularIntMap()
	b.ResetTimer()
	for _, v := range nums {
		rm.Store(v, v)
	}
}

func BenchmarkStoreSync(b *testing.B) {
	nums := nrand(b.N)
	var sm sync.Map
	b.ResetTimer()
	for _, v := range nums {
		sm.Store(v, v)
	}
}

/*
BenchmarkStoreRegular-32                	 5000000	       319 ns/op
BenchmarkStoreSync-32                   	 1000000	      1146 ns/op
*/