Author: Ernst A. Heinz
Date: 05:37:57 06/05/98
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On June 05, 1998 at 03:42:22, David Blackman wrote: >On June 05, 1998 at 03:02:30, Michael Kalisz wrote: > >>B.T.W did you also compile the linux kernel using the pentium optimized >>compiler? Because that really made a differens.... >> >>Regards >> >>Michael > >(not really addressed at me, but what the heck) I once tried getting the >pentium optimised GCC and compiling my chess program. Result: about 2 % >slower than the standard GCC (2.7.something back then) even when running >on a pentium. So then i tried compiling with -m386 and that turned out >to be faster than -m486 on both a 486 and a pentium. (again only a few % >difference). > >Now i use the standard gcc compiler with the Linux distribution, with >flags >-O2 -fomit-frame-pointer -m386 > >I guess i must code in a different style to everyone else. I've also >found that GCC is no worse than Digital Unix C on an Alpha, for my >programs. Gcc was 10% faster on one program, about the same for two >others, including the chess program. Nearly everyone else who has used >it says gcc is hopeless on Alphas. Yes, it actually is -- but only if you use the highest optimization level of DEC C with inter-file optimizations and everything enabled ... Maybe you just used -O2 for DEC C, too. =Ernst=
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