pigwantacat

reference resources：[How to generate a random string of a fixed length in Go?](https://stackoverflow.com/questions/22892120/how-to-generate-a-random-string-of-a-fixed-length-in-go) ```go func BenchmarkApproach1(b *testing.B) { for i := 0; i < b.N; i++ { _ = RandomString(1