Author: Vincent Diepeveen
Date: 08:31:35 09/29/02
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On September 28, 2002 at 11:12:29, Tom Likens wrote: For DIEP the gcc 3.1 compiler and further produce way faster code based upon enabling profiling. the 3.1+ gcc versions profit more from it than intel does. At a P3 even the gcc compiler is not measurable faster much, but the real difference happens on the k7. It seems to me that the intel guys of course didn't improve their compiler for the AMD processor. Instead it's only optimized for P4. Not even for P3 they achieve the best possible results, as GCC proves. I am under the impression that gcc simply is so fast for me simply because of better profiling capabilities. It increases speed by over 20%. >On September 27, 2002 at 23:37:43, Robert Hyatt wrote: > >[snip!] > >>>>>So reality is that the above result in reality is even more positive for >>>>>AMD than it looks like. We simply cannot trust these intel c++ compiles. >>>> >>>>Sure you can. I have tested the 6.0 release of their compiler exhaustively, >>>>comparing various optimizations with a known good executable from gcc 2.95.2, >>>>and the intel compiler is producing perfect code from a comparison of the >>>>two... > >Actually, in my tests it's producing *significantly* faster code (especially, if >you use the profile-enabled optimizations). > >regards, >--tom
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