Author: Vincent Diepeveen
Date: 07:34:23 06/08/98
Go up one level in this thread
On June 08, 1998 at 07:37:44, Robert Hyatt wrote: >On June 08, 1998 at 07:17:08, Vincent Diepeveen wrote: > >> >>On June 05, 1998 at 21:48:57, Robert Hyatt wrote: >> >>>On June 05, 1998 at 17:47:07, Bruce Moreland wrote: >>> >>>> >>>>On June 05, 1998 at 08:53:53, Ernst A. Heinz wrote: >>>> >>>>>BTW, we have been waiting to get our hands on a Alpha-21264 for roughly >>>>>a year because "DarkThought" will hopefully speed up as much on them >>>>>as "Crafty". >>>> >>>>What percentage of execution time do you and Bob spend doing these >>>>operations, do you think?netscape -install >>>> >>>>bruce >>> >>>FindFirstOne() = 1-2% in crafty. popcnt is much less... so that won't >>>help a whole lot. but the 64 bit stuff helps in general... >> >>Well that doesn't say anything concrete. >> >>More important is the overall delay. >> >>At a P133 intel the speed difference between crafty's move generator >>and diep's move generator is somewhat more than 3 times. >> >>Crafty is more than 3 times slower, because of bitboards, which perform >>badly at 32 bits. Note that the more possibilities, this 3 times will >>become >>4 times. >> >>For something taking 1 clockcycle in my program and which can >>be even pipelined in U + V pipe, >>crafty needs sometimes even a whole function. >> >>Greetings, >>Vincent > > >yes... but try to generate nothing but captures and compare that, which >is a major part of the total tree search... Where do i need to generate captures for? But to answer your question: 2.5 times faster.
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