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To compare different join string way used memoryCodefunc randomString(n int) string { b := make([]byte, n) for i := range b { b[i] = letterBytes[rand.Intn(len(letterBytes))] } return string(b)}func concat(n int) string { var s strings.Bui..

1. Execute defer inside the loopDescribe:Executing defer inside the loop will cause the resource to be relased late,because defer id executed after the method endsError Code:func error_code_defer() { for i := 0; i < 50; i++ { f, err := o