Author: Ernst A. Heinz
Date: 12:51:54 01/25/00
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On January 25, 2000 at 15:35:58, Robert Hyatt wrote: > > [...] > >Hsu mentioned "we disabled the futility pruning in the q-search which slowed >the >chip by a factor of 10..." Most noticed the factor of 10. _I_ noticed the >"we disabled the futility pruning". Because Hsu and I had had a _long_ >discussion about this in r.g.c a few years back. I ran a bunch of tests using >SEE, MVV/LVA and SEE+futility, and posted the results. Apparently he liked the >data and implemented this quietly. As far as I know, Hsu was always convinced that MVV/LVA with futility pruning in the quiescence search was the right way to go -- he already wrote about it in his Ph.D. thesis. Even "ChipTest" did it exactly like this I suppose. So, no surprises here. He did not implement anything quietly. >We learned something about DB (or at least >I did) in this simple discussion... Not really anything new ... unfortunately (see above). =Ernst=
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