Author: Dann Corbit
Date: 12:09:26 06/17/02
Go up one level in this thread
On June 17, 2002 at 15:04:35, Adriano Bedeschi de Souza wrote: >On June 17, 2002 at 14:46:03, Dann Corbit wrote: > >>On June 17, 2002 at 14:31:51, Adriano Bedeschi de Souza wrote: >> >>>On June 17, 2002 at 13:17:32, Sune Fischer wrote: >>> >>>>On June 16, 2002 at 22:42:02, Adriano Bedeschi de Souza wrote: >>>> >>>>>I need help! >>>>> >>>>>I am writing a chess engine and i have some doubts. >>>>>My main doubt is about speed, i have coded all the program based in Bitboards, >>>>>they r working properly but the speed is a lot bad! It makes less than 2000 >>>>>nodes per second !!!! >>>>> >>>>>note: i am using alpha-beta search, transposition table and iterated >>>>>deepening... >>>>> >>>>>Adriano Bedeschi de Souza >>>>>adriano.bedeschi@poli.usp.br >>>>>uin 58144572 >>>> >>>>Well off the top of my head: >>>>How are you generating the bitboards? >>>>How are you counting the nodes? >>>>Do you dynamicly allocate anything during search? >>>>Do you "pass by value"? >>>> >>>>-S. >>> >>> >>>=) >>>I pass by reference >>>I am counting the nodes properly =) no doubt >>>I dont use dynamic allocation >>>My bitboard generation is based in http://www.galahadnet.com/chess/chessprg/ >>> >>>and before u ask, i am no using a 286 =) >>>(its a k6-2 450) >> >>That model should be plenty fast. >>Are you compiling in release mode? >>What compiler are you using? >> >>I should expect your generation rate to be 100x what it is right now, at least. > >Corbit, > >I use GCC (with DevCpp) >The problem isnt the compiler, i used it with TSCP and it worked very well (good >bench) >I am using float's in the evaluation function, i will change it and test again >but can it be the only reason? I dont think so... Float should be just as fast as integer. The old "float slower than integer" debate was true long ago. But float on modern chips is incredibly fast -- especially AMD. It might even be possible that float is faster.
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