By reading Ross Cox's article: http://research.swtch.com/interfaces
I got an interface value is represented by a struct as the following:
> type interfaceStruct struct {
> value *_value
> inter *struct {
> typ _type
> mhdr []imethod
> }
> }
>
where value is a pointer pointing the real value allocated on heap.
In my understanding, the real values stored in an interface value are read
only.
So I think there is no need to copy the real value on heap when assigning
an interface value to another, is it right?
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