In theory the compiler can be smart enough, if it knows that the string
passed to fmt.Println is not stored and re-used someplace, but I do not
believe that is currently true. It probably has at least 2 copies, one to
the string in your code and a second one to make it a []byte to pass to the
io.Writer. I am not sure if the later has been optimized out or not.
-Paul
On Mon, Sep 19, 2016 at 4:10 PM, 'simon place' via golang-nuts <
[email protected]> wrote:
> well, seems to me if you need to access a string by index, you are
> assuming 1 byte per char. say ASCII, so for me you should be using []byte
> to store it, then 'cast' to see it as a string.
>
> https://play.golang.org/p/2NMye8gnzg
>
> surely this doesn't do any copying?
>
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