On Mon, 12 Jul 2004, Bryan O'Donoghue wrote:
> I've never benchmarked it, and I accept that it is therefore
> possible (but, extremely unlikely) that a glibc/kernel/java
> runtime/httpserver compiled for an i586 would be as fast or faster,
> then say such a system compiled specifically for a P4 for arguments
It's unlikely, code scheduled optimally for i586 does badly on i686.
> Somehow, I'm going to have difficutly believing a sizeable server
> application will not run any quicker compiled with -O3
> -march=pentium4, then it would with -mcpu=i586.
Btw, RedHat RPMs are compiled -march=i386 -mcpu=i686, optimised for
i686 without (in theory) using any i686 instructions.
regards,
--
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