On Mon, Aug 11, 2025 at 9:05 AM Haddock <bienlein1...@gmail.com> wrote:
>
> in Go there are no functions on built-in types like int, float, string. Let's
> say I do something like this to have a type mystring that has a function
> ToUpper:
>
> type mystring string
>
> func (self *mystring) ToUpper() mystring {
>
> return mystring(strings.ToUpper(string(*self)))
>
> }
>
> I'm new to Go, have little understanding and knowledge about it. So I'd like
> to ask what the cost is in that kind of helper functions and the involved
> conversions on things like memory load, added CPU time, etc.
The conversion from "string" to "mystring" has no run time cost. In
general, if you have "type T1 T2", then a conversion between "T1" and
"T2" has no run time cost.
Conversions between different types, such as "string" to "[]byte", can
have a run time cost.
Ian
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