Date: Thu, 26 May 2005 09:18:56 -0700 From: Kris Kennaway <kris@obsecurity.org> To: Mike Jakubik <mikej@rogers.com> Cc: freebsd-amd64@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: amd64 optimized gcc? Message-ID: <20050526161856.GA47336@xor.obsecurity.org> In-Reply-To: <2302.172.16.0.199.1117123959.squirrel@172.16.0.1> References: <200505251317.22128.nb_root@videotron.ca> <429514AF.5000306@roq.com> <20050526155612.GA38421@xor.obsecurity.org> <2302.172.16.0.199.1117123959.squirrel@172.16.0.1>
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--tKW2IUtsqtDRztdT Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, May 26, 2005 at 12:12:39PM -0400, Mike Jakubik wrote: > On Thu, May 26, 2005 11:56 am, Kris Kennaway said: > > On Thu, May 26, 2005 at 10:13:35AM +1000, Michael VInce wrote: >=20 > >> for warranty to come through on my old one. I did a buildworld under > >> 'CPUTYPE=3Dathlon64' in make.conf and 'CFLAGS=3D > >> -O2 -pipe -funroll-loops' for the the kernel. > >> I also used both to build all my ports including xorg and KDE. > >> > > > >> All this combined has made my laptop feel a lot faster. > >> > > > > Google for 'placebo effect' :-) Unfortunately, leet optimization flags > > do not measurably effect everyday system performance, only specific > > CPU-intensive operations. >=20 > Tell that to the Gentoo people :) There's nothing wrong with appropriately chosen optimizations (but e.g. -funroll-loops is probably stupid), but pretending you can "feel the power" is self-deception. Kris --tKW2IUtsqtDRztdT Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFClfbwWry0BWjoQKURAjG3AJ4vbrfYYGHUrrbIj6yCeLAGnIUY3ACg3OYB RUI9W9ZEYHt82YiTN2BWD+s= =eJ2L -----END PGP SIGNATURE----- --tKW2IUtsqtDRztdT--
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