[ILUG] Favourite flavours

[Paul Jakma]

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,
-- 
Paul Jakma	paul at clubi.ie	paul at jakma.org	Key ID: 64A2FF6A
 	warning: do not ever send email to spam at dishone.st
Fortune:
On the whole, I'd rather be in Philadelphia.
 		-- W.C. Fields' epitaph