Author: Vincent Diepeveen
Date: 14:04:44 07/29/03
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On July 29, 2003 at 16:13:19, Keith Evans wrote: >On July 29, 2003 at 16:00:20, Tord Romstad wrote: > >>On July 29, 2003 at 12:49:49, Keith Evans wrote: >> >>>You're perft performance seems pretty decent to me. >> >>Indeed. I just did a similar test with my own program on a Pentium 4 2.4 GHz. >>In the position after 1. e4 e5 2. d4 d5, my program generates 30 million moves >>per second. I guess I could speed it up somewhat, but I don't think I would >>come anywhere close to the speeds reported by Vincent and Angrim. >> >>My move genererator assigns all moves a move ordering score, and also >>determines which moves are checks. It generates legal moves only. >> >>But anyway, I don't understand why people spend so much time and energy on >>micro-optimising their move generators. Despite my slow movegen speed, my >>program spends only 1 or 2 percent of its time in the move generator. I >>guess most other programmers have similar numbers. >> >>Tord > >I'm personally interested in the performance of the move generator in a hardware >chess chip where it is a large percentage of the total cycles. If it were only >1-2% of the time then I wouldn't be interested. Of course a hardware move >generator can generate millions of NPS when only running at say 30 MHz, so it's >a totally different animal than a software generator running on a 3 GHz >processor. hardware doesn't work like that. you cannot store the moves. >Keith
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