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Evaluation speedup or (dynamic evaluation)
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Mike Libanan



Joined: 01 Sep 2011
Posts: 123
PostPost subject: Re: Evaluation speedup ; dynamic evaluation    Posted: Sun Apr 08, 2012 12:47 pm Reply to topic Reply with quote
bob wrote:

I don't see how to avoid it without a test. How can you determine whether to call the function or not without testing. And if you test, you may as well do it in the place where it makes the most sense. In Crafty, I tested the idea of seeing if I had a piece before calling the piece evaluation. But I STILL need the test in the function to determine when all have been processed. When you think about it, what I do is actually pretty efficient.

One could possibly do N evaluations, each with one or more piece types missing for a specific color. But again, you have to decide somewhere which one of those to call. I've run across one or two machines over the past 45 years or so that could do this pretty well. One could have an array of function addresses to jump to, and when a piece type no longer exists, you could set the address in the array to zero. On those machines, a "branch and link" to address zero was an effective noop... But not today that I know of.


Noted. thanks for all responses
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Display posts from previous:   
Subject Author Date/Time
Evaluation speedup or (dynamic evaluation) Mike Libanan Thu Apr 05, 2012 12:27 am
      Re: Evaluation speedup or (dynamic evaluation) Robert Hyatt Thu Apr 05, 2012 7:06 pm
            Re: Evaluation speedup ; dynamic evaluation Mike Libanan Thu Apr 05, 2012 11:10 pm
                  Re: Evaluation speedup ; dynamic evaluation Marco Costalba Fri Apr 06, 2012 5:39 am
                        Re: Evaluation speedup ; dynamic evaluation Sven Schüle Fri Apr 06, 2012 12:01 pm
                  Re: Evaluation speedup ; dynamic evaluation Robert Hyatt Sun Apr 08, 2012 1:51 am
                        Re: Evaluation speedup ; dynamic evaluation Mike Libanan Sun Apr 08, 2012 12:47 pm
                              Re: Evaluation speedup ; dynamic evaluation Ronald de Man Sun Apr 08, 2012 1:23 pm
                                    Re: Evaluation speedup ; dynamic evaluation Robert Hyatt Mon Apr 09, 2012 5:10 pm
                                          Re: Evaluation speedup ; dynamic evaluation Ronald de Man Mon Apr 09, 2012 7:29 pm
      Re: Evaluation speedup or (dynamic evaluation) Ricardo Barreira Thu Apr 05, 2012 8:26 pm
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