On Fri, Dec 22, 2023, 04:25 David Brown via Gcc-help <gcc-help@gcc.gnu.org>
wrote:

>
> For this test, since there are not many source files, I'd put them all
> on the same gcc line :
>
>
> default: all
> .PHONY: all
>
>
> OPTS = 0 1 2 3 g fast
>

It's worth testing with march=native and flto, both provide easy wins if
you can accept any implied limitations.

>