Author: Dave Gomboc
Date: 00:16:33 02/14/00
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On February 13, 2000 at 17:44:43, Dan Newman wrote: >On February 13, 2000 at 12:20:21, Will Singleton wrote: > >>On February 13, 2000 at 06:57:16, Dan Newman wrote: >> >>>On February 13, 2000 at 03:35:50, Will Singleton wrote: >>> >>>>I am always interested in the nps kibitzed by programs playing on ICC. You can >>>>never be sure as to the accuracy, since one can fiddle with the numbers. But I >>>>was surprised the other day to see an amateur program getting in excess of 1 >>>>million nps on a 700mhz machine. Many amateur progs get around 100knps or less. >>>> >>>>Just wondering. Anybody get close to or more than 1000 nps per mhz? >>>> >>>>Will >>> >>>Shrike gets about that. A month or so ago it was hitting 530 knps on a >>>PIII/500, but now it's down to 490 after adding a bunch of eval. (These >>>figures are average over WAC.) It maxes out at about 750 knps--when there's >>>only one pawn left :). So I guess I'm at about 980 nps/MHz and going down... >>> >>>-Dan. >> >>What do you do to get that speed? Bitboards, slim eval, anything else? >> >>Will > >Well, I tend to unroll loops, and avoid if-tests where possible. I use >switch statements to select just the right piece of code in the move >generators and make/undo and thus avoid a lot of if-tests. My code >is rather bloated as a result: about 11,000 LOC with the comments stripped >out. > >-Dan. How much faster do you think a switch is than using virtual dispatch? Dave
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