Author: scott farrell
Date: 15:15:31 11/14/03
Go up one level in this thread
On November 14, 2003 at 12:50:02, Peter Kappler wrote: >>> >>>Grok averages around 250knps in the middlegame on an Athlon 1400. You >>>didn't list your hardware, so I'm not sure how we compare. >> >>wow, that is much faster than mine. I have a 2500xp Barton, clocked to 3200, and >>average probably 150Knps in the mid game. That's about 2.25 times faster than >>chompster ... that would be nearly 600Knps on my hardware.... mmmm .... I am not >>very impressed with myself. If I had 600Knps, I could take on any engine .... I >>can't keep using the - "its java - its slower" excuse. Maybe its bitboards, >>maybe its because I generate all moves first, maybe my eval is heavy, maybe I >>get better move ordering ... or .... maybe I have sloppy code. >> > >Whose VM are you using? Sun's is 30% slower tham IBM's. Microsoft's is >somewhere in between. BEA's is almost as fast as IBM's but seems to be buggy. > I am using SUNs, might check out IBMs (I am an IBM business partner). >Another thing to avoid is creating new objects during your search. Pre-allocate >whatever you need. Run a profiler against your code to see where you are slow. > (Use the -Xprof switch with Sun's VM.) > yes, i do lots of profiling, and no new objects, new primitives all over the place, but I dont think that is a big concern. thanx for the tip on jvm, 30% for free will be nice for cct6 Scott >Finally, we might be counting nodes differently. In Grok, any time I update the >board with a new move, that's a node. I think that's how most people do it. > > >>I just worked out I'll be Overseas on holidays skiing at Whistler Canada when >>cct6 is on. I might need to lean on a few people to make sure chompster enters >>the comp. >> >>Is grok online much of the time? I'd love to play against it, not to compete, >>but to see differences. >> > >It plays on ICC occasionally. I'll probably be there this weekend. > >> >>Are you getting a faster CPU for CCT6? >> > >Setting up a new machine is enough of a hassle that I try not to do it unless I >can get at least a 2x speedup. Unless I'm misinterpreting the benchmarks on the >fx-51, I don't quite see a 2x speedup vs my old Athlon 1400. > >-Peter
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