On Sun, Jan 18, 2009 at 7:10 PM, Bill Bumgarner <b...@mac.com> wrote: > Simple question: Is it better to pursue a 20%, or even 50%, improvement in > drawing speed by rewriting in C++ or C than, say, preventing the 2, 3, 4, or > more extra redraws that are happening prior to window flush? Don't laugh > -- I have seen it happen. Often.
This just got posted to programming.reddit.com: "My iPhone is not a Mac Pro": http://www.reddit.com/r/programming/comments/7qxuv/my_iphone_is_not_a_mac_pro_speeding_up_iphone/ In it, the author discusses improving the speed of his iPhone app. Importantly, he starts by improving the data structure in which he stores the app's data, and then improving the algorithms used to access that data. Eventually he employs some C++ to get a significant speed boost, but the decision has *nothing* to do with non-virtual member functions or other such oft-touted C++ speed improvements -- in fact, he compares it to using -[NSArray sortedArrayUsingFunction:context:], which doesn't incur the ObjC dispatch overhead. It's all about the algorithm, and C++ happened to have one he could use that improved his code's speed. --Kyle Sluder _______________________________________________ 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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
