Author: Andrew Williams
Date: 05:48:21 09/25/99
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On September 25, 1999 at 06:59:06, Frank Phillips wrote: >My program compiled with MSVC++ 6 (Enterprise) is almost 30% slower than the >same code with the same options compiled with MSVC++V5, which is a bit >disappointing. The simple test I did was a fixed depth search for six middle >game positions. More worrying than the decrease in speed is the number of nodes >to reach the fixed depth which have increased under VC6. > I've just read this quickly, but I think you have a problem if the number of nodes changes when you compile with a different compiler. This suggests possibly an unset variable or some other subtle problem (maybe an expression that is only partially being executed?). The optimization done by one of the compilers is exposing the problem. >Usual type of program - PVS with hash tables. Mixture of bitboards and offset >arrays. > >What am I missing? > >Frank Andrew
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