AFAIK, there have been mixed results which depend on which version of gcc 
you're running. While reading on the topic a few months back, the general 
consensus seemed to be that in general i686 (which is what I'm compiling 
with) actually resulted in slightly slower performance in some areas but this 
WAS expected to improve as gcc evolved. 
I think it also yields somewhat longer compile times, again this is expected 
to only improve. 

In any case, I don't think there is noticeable difference in choosing either 
for most desktop environments.

I think of more importance is the march flag (which I've got set to 
"pentium-m") which are supposed to include power saving optimizations.

Cheers

Marek

On Monday 19 December 2005 12:34, Visser, Martin wrote:
> All,
>
> I just "googled" for "benchmark performance linux kernel i386 versus
> i686" and found nothing of any import. I am just wondering if anyone has
> bothered doing this. It would be nice to know what the tradeoff is
> between performance and convenience of not needing to know the CPU
> architecture. Using multi-CD distros I would also choose the closest
> matching kernel, but for my Ubuntu installs I haven't bothered.
>
> Martin

-- 
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Marek W

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