]> Thanks for your suggestions. Here are the results. On Sat, 20 Jul 2002, Oleg <oleg_inconnu@myrealbox.com> wrote: > > If you are using fortran layout (column-major) why are you > incrementing rows in the inner-most loop? (AFAICR this can make a > big difference with GCC, perhaps O'Caml too). Ooops! You are correct this make the times more reasonable (about 2 to 3 times C). > Also, each loop seems to contain a call to function Array2.dim2. > Can't this number be cached? Well, that in fact has the opposite effect of increasing very slightly the running time. > Thirdly, does bigarray access check bounds? Can this be turned off? It does. And I don't think it can be turned off. > And finally, you might try to experiment with 0-based indexing [1], > it may turn out to be faster. Very same running times. Cheers, ChriS ------------------- To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/ Beginner's list: http://groups.yahoo.com/group/ocaml_beginners