Re: [gentoo-dev] "Distro Day (Measuring the benefits of the Gentoo approach)"

["Philippe Lafoucrière" <lafou@wanadoo.fr>]

On Wed, 2003-08-13 at 16:24, David Holm wrote:
> If they really wanted to test the speed why didn't they use more aggressive compiler flags?
> 
> I think it should be investigated which packages could be compiled by icc since
> intel are now providing it for free for non-commercial use. I did some tests with it and
> whetstone (classic fpu benchmark from the 1970's) doubled in speed compared to gcc on a P4, and
> it was about 75% faster on an Athlon-XP. Now float-point isn't everything but from my experience
> icc generally produces better optimized code than gcc unless the application has been hand-tuned
> (like mplayer).
> I tried installing gentoo with CC=icc once but I had problems with many ebuilds so I dropped
> that idea. At the moment extremely few ebuilds support icc.


Just realized that they are using march=pentium3, whereas celeron is a pentium2 (cf /etc/make.conf !). 
the use of march can really slow down the machine I think...


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