Hi, I just performed some experiences with the "breedthreads" and "evalthreads" parameters on the tutorial regression problem. On a dual core machine, I observed that the performance increases (computing time roughly divided by 2) when breedthreads = 2 & evalthreads=1, but there is no gain when breedthreads = 1 & evalthreads=2 . However the stat file shows that most of the running time is spent for evaluation (as expected). Is there some dependencies between breedthreads and evalthreads values ? -- Denis Robilliard L.I.L. Université du Littoral 50 rue F. Buisson 62100 Calais France