Author: Russell Reagan
Date: 22:40:11 12/03/03
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On December 03, 2003 at 22:51:43, Sune Fischer wrote: >>Clock for clock, Crafty is about 60% faster on 64-bit hardware. IE a 2GHz >>Opteron would run Crafty about 60% faster than a 2GHz 32-bit Athlon. Gian Carlo >>reported that Sjeng ran 70% faster, clock for clock. > >The Opteron has lots of improvements other than the 64 bit thing, so it is still >not exactly known what is contributing where for Crafty. > >I suspect Crafty would get a good speedup on a 32-bit Athlon too if it had 1 MB >cache and more registers, this should somehow be factored out. > >Granted that's not easy to do, but if/when we manage to take a handfull of >bitboard programs and compare their speedup to a handfull of non-bitboard >programs, then we might get a better impression of how much the 64-bit thing is >an issue on the overall. > >It is also possible that the first generation chess programs and compilers won't >be optimal. First tests are often 'worst case' senarios. I didn't say that the speedup was due only to the 64-bit nature of Crafty. I just said there was a 60% speedup :)
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