> > On Aug 7, 2013, at 14:34 , Trygve Inda <cocoa...@xericdesign.com> wrote: > >> I am currently doing it on an NSThread. I may try replacing all the doubles >> with floats in the algorithm and see how that goes (on a backup of course!). > > Yes, floats should help (unless precision errors make it worse). You'll be > moving a lot less memory around, and they're computed in hardware (I think > double requires software intervention, but I could be wrong about that). > >> How do I set optimization on a per-file basis? > > In the Target settings, Build Phases tab, Compile Sources phase, you can set > individual compiler flags. I put -O3 on each of the files I want optimized. > -O2 or -Os should be tried, too, to see which gives you the best results. >
I tried using floats and the results were wrong, presumably due to lower precision and compounding of errors (but it took roughly the same amount of time as doubles). _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
