From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Woodcraft To: gcc@gcc.gnu.org Subject: Re: compiling linux kernels with GCC 3.0 Date: Wed, 10 Oct 2001 15:39:00 -0000 Message-id: <20011010233922.A510@golux> References: <200110101808.LAA29085@atrus.synopsys.com> X-SW-Source: 2001-10/msg00688.html On Wed, Oct 10, 2001 at 11:22:22AM -0700, Linus Torvalds wrote: > On Wed, 10 Oct 2001, Joe Buck wrote: > > > > Since we've had some issues with performance regressions, but also have > > some performance improvements especially for x86 > > Has this actually been verified by _anybody_? > > I'm sorry to say that I have not heard of a single performance improvement > on x86. I know, I know, it's been one of the touted features of 3.0.x, but > I've not actually seen code that actually _runs_ faster, only code that is > larger and slower. I have. GNU Go runs faster. And as it's the only program I ever have to sit around and wait for, this is a significant gain. Compiling with -O2 -march=i686: % ./gnugo-3.0.0-gcc2.95-march=i686 --quiet --seed 1 --benchmark 12 Result: W+14.0 13 moves played in 95.778 seconds 7.368 seconds/move % ./gnugo-3.0.0-gcc3.0-march=i686 --quiet --seed 1 --benchmark 12 Result: W+14.0 13 moves played in 90.160 seconds 6.935 seconds/move -M-