From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 26378 invoked by uid 1002); 13 Aug 2003 19:00:07 -0000 Mailing-List: contact gentoo-dev-help@gentoo.org; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-dev@gentoo.org Received: (qmail 4706 invoked from network); 13 Aug 2003 19:00:06 -0000 Date: Wed, 13 Aug 2003 15:00:03 -0400 From: Jon Portnoy To: David Holm Cc: gentoo-dev@gentoo.org Message-ID: <20030813190003.GA21782@cerberus.oppresses.us> References: <1060781901.7508.17.camel@biproc> <20030813162432.7decc94e.dholm@gentoo.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030813162432.7decc94e.dholm@gentoo.org> User-Agent: Mutt/1.5.4i Subject: Re: [gentoo-dev] "Distro Day (Measuring the benefits of the Gentoo approach)" X-Archives-Salt: 215f1fb7-d5b3-405d-b16b-85378bd08e0b X-Archives-Hash: b9abf86f0bb6e27410b1f3978fa4cc3f On Wed, Aug 13, 2003 at 04:24:32PM +0200, 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. > That's because there's no reason each and every ebuild needs to have something changed when most of the time 'supporting icc' is just a matter of altering the usual environment variables... At the moment Zadeh and einride are working on ICC integration. einride has some excellent ideas about Portage integration, so hopefully that'll get us somewhere. -- Jon Portnoy avenj/irc.freenode.net -- gentoo-dev@gentoo.org mailing list