如何从Golang中的映射或数组获取内存字节？ [重复]

Question

This question already has an answer here:

• Computing the memory footprint (or byte length) of a map 1 answer
• How much memory do golang maps reserve? 2 answers
• How to get memory size of variable in Go? 2 answers

If we use a map like map[string]string

Is it possible to get a actual memory use of map from the code below?

for i, v := range x.(map[string]string) {

  CacheBytes += len([]byte(i))
  CacheBytes += len([]byte(v))

}

When I trying to get memory bytes from variable, I did like

// get bytes from different types

        switch x.(type) {

        // string would be simple
        case string:
            s = x.(string)
            CacheBytes += len([]byte(s))

        // but in case of map...?
        case map[string]string:

            for i, v := range x.(map[string]string) {

                CacheBytes += len([]byte(i))
                CacheBytes += len([]byte(v))

            }

        // Or array...????
        case []string:

How can we get actual bytes memory that uses by map or array in Golang? I know it's bit complicated coz' of data structure, would be appreciated if anyone can help.

Thanks.

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