Author: Matt Taylor
Date: 10:37:36 12/24/02
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On December 24, 2002 at 05:16:37, Sune Fischer wrote: >On December 23, 2002 at 21:29:08, Arshad F. Syed wrote: > >>Is there anyone here who has actually converted their C code to C++ while >>keeping the NPS the same or even managed to improve upon it? Sune did mention >>that he did so only at the cost of 15% degradation in speed. Why do people even >>bother wasting their time with C++ for a chess program when it inevitably leads >>to taking a hit in NPS? Regardless, of all the advice to simply inline the >>functions, I have yet to see a living example of chess program code which >>performed faster in C++. >> >>Regards, >>Arshad > >That problem is solved now, I just needed to inline a few functions and speed >went back up. > >It's tiny things really, like I had a GenCastleMoves which was called from >GenMoves. In GenCastleMoves I checked the flag first, most of the time this flag >isn't set so castle is illegal and I can return, it's just a function call >overhead for nothing. > >Actually I would like full inlining here, to have GenMoves and GetNextMove >inlined in my Search. But if I understood things correctly, I would then need to >have all the code in one huge file. I don't want that. > >-S. One of the weaknesses of C/C++ compilers in general is that the compiler can only inline what it sees. It is interesting that, in VC 7, the linker can do inlining. I was very pleased when I read that because it means I can practice good design without having to expose unnecessary portions of my code for inline functions. -Matt
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