On Fri, 9 Mar 2001 wojtek@wojtek.from.pl wrote:

> >
> > 	I seem to recall someone commenting that -mpentiumpro gives a
> > 	slight drop in performance for 386 and 486 chips, and a bigger
> > 	gain everywhere else.
>
> it was me probably. i've don some tests. -mpentiumpro looks almost as same
> speed on i386, up to 5% slowdown on i486, but it's 5-10% smaller - takes
> less memory, and finally faster on pentium and pentiumpro.
>
> > 	If so it might still be worth considering for the default.
> >
> > 	Actually, does anyone have a reference to a table of relative
> > 	gain/loss and compatability for i386 -march and -mcpu options?
> > 	It would be good to get that information up on the netbsd site
> > 	to give more people the right information to select optimisation.
>
> i could do some tests on many different programs... i have pentium and
> pentium III.
>
	It would be interesting to have some real numbers - particularly
	for i386 and i486 too.

		David/absolute		-- www.netbsd.org: No hype required --