Author: Gian-Carlo Pascutto
Date: 16:36:13 05/02/04
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On May 02, 2004 at 18:49:38, Robert Hyatt wrote: >On May 02, 2004 at 18:23:44, Gian-Carlo Pascutto wrote: > >>On May 02, 2004 at 13:12:04, Robert Hyatt wrote: >> >>>He sent me an email trying to justify his poor performance. He first claimed >>>that it was an artifact of null-move. Testing disproved that. >> >>What testing? >> >>-- >>GCP > > >The testing you and I both did. It showed a minimal speedup difference if you >recall. 2.8 vs 3.1... not _that_ significant... For 4 processors, it looks small (I don't happen to agree an 11% speed decrease is 'not significant' - I would be very happy which such a speedup). But it's not that easy to get that 0.3 back. The real problem is that scalability is reduced, and there are consequences at 8 or 16 cpus. As far as I'm concernced, the testing showed that Vincent was right and that recursive nullmove *does* change things. You were firmly claiming that it didn't matter a thing, before. So your recollection of whose claims were disproven is certainly a bit selective, to say the least. -- GCP
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