Joost van der Sluis wrote: >>>I don't know if rtl-optimilisation patches have a large priority, but >>>nevertheless this patch improves the speed of the sysutils.uppercase and >>>lowercase functions. >> >>I fail to see how changing a while loop to a for loop improves speed ? >>I could understand if you'd use a PChar and use pointer math, but not this ? > > > I wasn't completely sure, so i made a test-prog which called the function > 50.000 times, and measured the time it took to run a few times. > > And then again with the other version. (approx 2.5 sec against 1.4) > > And I think it's because the removal of the begin/end.
begin/end doesn't change any code. > And Peter always > says that you can't change the running variable in a for-loop because of > the optimilisations... So i suppose that a for-loop has several > optimilisations which a while doesn't... Yes. Can you test also with a forward loop? _______________________________________________ fpc-devel maillist - [email protected] http://lists.freepascal.org/mailman/listinfo/fpc-devel
