for i := 0; i < 8; i++ {
		m[strings.Repeat("K", i+1)] = true
	}
	key := strings.Repeat("K", keySize)
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		_ = m[key]
	}
}

func BenchmarkIntMap(b *testing.B) {
	m := make(map[int]bool)
	for i := 0; i < 8; i++ {
		m[i] = true
	}
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		_, _ = m[7]
	}
}

func BenchmarkMapFirst(b *testing.B) {