一个go type assertion是否会产生拷贝的问题

这样写好？： p := []interface{}{"abc", map[string]string{"key1":"val1","key2":"val2"}} str, _ := p[1].(map[string]string) fmt.Println(str["key1"]); 还是这样写？： p := []interface{}{"abc", &map[string]string{"key1":"val1","key2":"val2"}} str, _ := p[1].(*map[string]string) fmt.Println((*str)["key1"]);