On Nov 16, 2011, at 11:52 AM, Don Quixote de la Mancha wrote: > On Wed, Nov 16, 2011 at 10:29 AM, Preston Sumner > <preston.sum...@gmail.com> wrote: >> Can you confirm that the reason the particular software you use is huge, >> bloated, and slow is specifically because of objc_msgSend() and not >> shortcomings in the application's design or the addition of new, >> resource-intensive features to take advantage of the more powerful hardware? >> The "premature optimization" response is a colloquial expression of the >> philosophy that effort should be spent where performance metrics dictate it >> should. > > Did you ever use any of the early releases of Mac OS X? It was so > slow as to be largely unusable until 10.3 (Panther). Mac OS X had > been shipping to end-users for quite a long time before most end-users > gave up Classic completely. Professional audio in particular just > didn't work in OS X for quite a long time, so serious audio people had > to stick with Classic.
Can you confirm that those issues were due to objc_msgSend() and not the immaturity and newness of system frameworks and subsystems? Professional audio adoption wasn't an Objective-C issue; DAWs were Carbon apps anyway. Concern over message dispatch performance is premature unless there's a perceptible impact. If your code is time critical, you'll be avoiding high-level features regardless of language. For what it's worth objc_msgSend() is implemented in hand-written assembly. Its code as of 10.6.2 is explored here: http://www.friday.com/bbum/2009/12/18/objc_msgsend-part-1-the-road-map/ Preston_______________________________________________ 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
