Author: Keith Evans
Date: 13:13:19 07/29/03
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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. Keith
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