How Go Compiler oprimize method with value or pointer receiver/functions

[Richiise Nugraha]

Hi all, I have a few question regarding Go compiler optimizations.

How Go Compiler (gc) optimize methods with value or pointer receiver (or functions)?

Does a method with value receiver always create a copy of data to its stack or the copy happend if there's a write attempt to it (CoW, or used fields)?

From what I know it always create a copy of data with DUFFCOPY, but I am not sure if there's another cases.

For example I have 2 methods. Value, pointer receiver, respectively:

[Link: https://godbolt.org/z/dhTxez5jK]

TEXT main.Donothing(SB), NOSPLIT|ABIInternal, $0-216

TEXT main.PtrDonothing(SB), NOSPLIT|ABIInternal, $0-8

Function `main.Donothing` has a big stack size compared `main.PtrDonothing`

And how does that affect inline budget

Thank you.