Winboard Forum

I was comparing my perft results to Sjeng 11 and when I did it on
PIV 2GHz I couldn't find nothing to worry...

Initial position, depth 6:
Sjeng 37.93 s
My engine 36.77 s

...but when I did it on Athlon 1700+ results made me feel gloomy

Sjeng 27.03 s
My engine 41.56 s

After all I don't know what I am doing wrong
What kind of operations are working faster on Athlon??
Had you similar problem?

Hi,
sounds to me like a compiler issue. You might want tro try some other compiler switches in order to improve the performance of your engine on the AMD as well.

Roman

Yes it is probably related with compiler, but change compiler it is bad
solution for me. I'm rather interested in discovery causes in my code.
I have my own habits in programming and difference in increase speed between my new engine and Armageddon are on the same level on each processor. However Armageddon is a little faster on Athlon.
I have some suspicions related with places where my move generators put moves (table, structure, kind of table, kind of structure), but I think it is not only this reason. My programs have been written in C++. Who now maybe this fact have influence on compiler. I haven't idea