Author: Russell Reagan
Date: 17:47:43 04/17/03
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On April 17, 2003 at 20:35:35, James Robertson wrote: >My program's move generator runs at roughly the same speed on both systems. >... >It seems strange that this would make such a large difference. Can anyone give >any reasons why? The only thing that comes to mind is that the PIII's bsf/bsr instructions are 1-2 cycles, but I don't know if your Pentium is a PIII or not, and you said you didn't use assembly anyway. >I used no assembly, just C/C++ code, with all the default >compiler options on all tests. When you say "default compiler options", what does that mean? In MSVC, "default" is to compile in debug mode, which is just slow. Same if you compiled with gcc with no optimizations. If this is what you're doing, that could well be the problem, because execution speeds of debug versions really shouldn't be used for benchmarking purposes :)
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