Author: Vincent Diepeveen
Date: 11:27:06 07/18/99
Go up one level in this thread
On July 18, 1999 at 13:18:42, Andrew Williams wrote: >On July 18, 1999 at 13:01:40, Robert Hyatt wrote: > >>On July 18, 1999 at 11:06:34, Andrew Williams wrote: >> >>>On July 18, 1999 at 10:00:42, Robert Hyatt wrote: >>> >>>>On July 18, 1999 at 03:17:02, Scott Gasch wrote: >>>> >>>>>What are the typical ways people use to improve the speed of the searching >>>>>algorithm? Here's what I have done: move ordering / history, memory pool for >>>>>moves so I am not calling malloc/free, optimized my C as much as I can, save a >>>>>pointer to the kings on a board representation so I do not have to search for >>>>>them when looking for checks. >>>>> >>>>>And still the program is sluggish; it gets a little over 20,000 nodes/sec on my >>>>>AMD K6-3 400. For comparison I clocked TSCP on the same machine and it is >>>>>getting about 15,000 nodes/sec. >>>>> >>>>>How can I speed this up more? What is a good speed on this kind of hardware? >>>>> >>>>>Thanks, >>>>>Scott >>>> >>>> >>>>First thing to check is your compile options. 15K is _very_ slow. It should >>>>be 10x that for TSCP... >>> >>> >>>Do you mean "2x that for TSCP"? I just tried mine and got approx 30Knps - this >>>is on a K6-2 300. (The position I tried was after 1. e4 e5 2. Nf3 Nf6) >>> >>>Andrew >> >> >>No... something is wrong. Crafty, on a P5/133, hits around 30K nodes per >>second. You are on a machine 3x faster at least, maybe 3.5x. It sounds like >>the optimizer isn't enabled... > >Unless there's something odd about my copy of TSCP, I think it's just that >TSCP is miles slower than crafty. On my K6-2 300, crafty delivers 106K nps >on the "bench" command (this is v15.4), which is about in line with what >you're quoting for the 133 machine. Crafty way over 220k at a PII450 here. Diep at a PII450 is 15k a second, which is already close to TSCP speed, gotta be something huge wrong with TSCP. Anyone profiled it? Is TSCP a DOS program? >regards >Andrew
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