Author: Pallav Nawani
Date: 09:44:10 02/15/05
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On February 15, 2005 at 12:32:37, Dann Corbit wrote: >On February 15, 2005 at 12:26:36, Pallav Nawani wrote: > >>Hi, >> >>My chess engine, Natwarlal is very slow, getting 350KNPS on an Athlon 1700. >>Crafty, on the other hand does an hefty 650K. What is the most important thing >>for high NPS of the engine? There are a few speedup tricks that I know, and I am >>not using them, but can anyone quantify the speedup in % provided by these, >>and/or add some new ideas? >> >>1. Pawn hash (Natwarlal uses it, but not efficiently). >>2. King hash >>3. Eval cache >>4. Lazy eval. Natwarlal dosen't use this, but then Natwarlal's eval is very >>skimpy already! >>5. Any other trick? >> >>Thanks, >>Pallav > >Profile your program and find out where the time is going. > >The way to speed up your program is to identify the slow spots. That's the problem. I try to profile it with gprof and it hangs after 4 ply :( That's an improvement from before, when it used to crash almost immediately :)
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