Author: Robert Hyatt
Date: 13:02:04 06/20/02
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On June 20, 2002 at 15:58:29, Tom Kerrigan wrote: >On June 20, 2002 at 15:25:36, Sune Fischer wrote: > >>So what you are saying is that you can't just count the number of operation and >>use that to pridict the speed? > >Counting the operations is difficult. You can't just go through the source code >and count them because that doesn't tell you how often the code is run. > >>Now if Crafty is 50% 64 bit operations then we can expect a factor of two in >>speedup on that 50%, right? > >I think Crafty must be << 50% 64 bit operations. Think about all the data that >Crafty must operate on that isn't bitboards... > >-Tom Which data is that? The top 80% in profiling depends on bitboards heavily. generating moves, evaluating positions, updating the bitmaps in make/unmake, detecting checks, evaluating Swap(). I doubt it is << 50% (where << typically means "much less than").
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