Good grief, no. I'm not just talking about accessors. Try re-reading: > In addition, in many cases where Objective-C would have one or more method > dispatches in innermost performance-critical regions, with C++/STL you will > have NO FUNCTION CALL AT ALL, but rather direct pointer-based data access or > inlined code. In my own testing, I've found that to be the biggest difference, > because Objective-C method dispatch is in fact pretty efficient method > dispatch.
Objective-C severely limits the degree of inlining that can be accomplished when using classes and method calls. C++ allows (promotes, really) a heavy degree of inlining. > I'm not sure you appreciate the irony of having "people who don't > really understand Objective-C" and "but in Objective-C would require > raw C" in the same sentence. There is no irony at all. Of course Objective-C is just C plus an efficient dispatcher & some easy syntax. Of course you can rewrite in raw C. The point was, in C++, you can get the same performance as the raw C, but without using raw C, while still using the higher-level objects & method calls (which in some cases will even be far less verbose than Objective-C.) > As a consequence of this, your statements that "ObjC is far less > efficient than C" are rather specious. I never said any such thing. Please do not set up straw man arguments to knock me down--I *will* call you on it, *every* single time. > The only reasonable way I can > think of that would lead you to this conclusion is that you're not > comparing apples to apples, i.e. you're using struct->var type > accesses in C, and getter/setter runtime dispatched methods in ObjC. You clearly have no idea about the optimization possibilities of C++ class templates. In essence, the stricter/static typing of C++ allows many more optimizations to be applied to object-oriented code (not just plain C), and the more dynamic typing of Objective-C restricts the possibilities (while enabling techniques that are particularly nice for UI work). -- Scott Ribe scott_r...@killerbytes.com http://www.killerbytes.com/ (303) 722-0567 voice _______________________________________________ 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
