Author: Andrew Williams
Date: 16:07:59 04/13/01
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On April 13, 2001 at 18:17:32, Dann Corbit wrote: >On April 13, 2001 at 17:45:10, Vincent Diepeveen wrote: > >>Hello, >> >>gcc in past always was very slow for me. 2.95.2 especially was >>at a PIII-cumine core around 10.8% slower. Note Xeons seem not >>made from the same core so always were slower as celeron and PIII >>for me. >> >>PIII itself nearly 20% faster as PII katmai core. Xeon 7% faster as PII >>and celeron 7.5% faster. >> >>However that's all single cpu measured. >>When running dual then very interesting is the size of the >>program in the L1,L2 caches (when talking about DIEP that is). >> >>Single cpu gcc 2.95.3 is only 8% slower as visual c++ 6.0 sp5 now. >>Using compile options: >> -O5 -march=pentiumpro -mcpu=pentiumpro -fno-gcse -fforce-mem >> >>note -mcpu=pentiumpro might be not needed as march might already >>mean that. >> >>Now if i take the exact same executable and compare it with 2.95.2, >>then the executable is 100kb smaller!! >> >>I was very happy about it but it started to amaze me when i >>started running it. >> >>Of course when running parallel it's very hard to measure very exactly >>differences. So i did some quite long testruns and compared at the >>same depth the nodes a second that visual and gcc got. >> >> gcc 2.95.3 : 68311 >> msvc 6.0 sp5 : 70110 >> >>Now THAT is amazing as it is even from head only about >>3% difference in speed. >> >>Hardware used was my dual 800PIII. 256mb ram and hashsize i chose was 150mb. >>In the test no EGTBs were loaded. >> >>So GCC is getting better again! HIEP HIEP HORAY! > >If you are using Cygwin, it comes with a 12 ton caveat: >You have to PAY to redistribute commercial applications that use Cygwin! > >I don't know of PGCC or any of the others have this awful restriction, but it >deserves looking into. > >See (for instance): >http://sources.redhat.com/cygwin/cygwin-ug-net/are-free.html > >!!! > >Welcome to the world of free software. It's like that 'Fram' add -- "You can >pay me now, or pay me later." I don't think it's particularly fair to take Cygwin as an example and then suggest that all free software works under the same conditions. Andrew
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