Volgens betrouwbare bronnen van MacOS Rumors worden er dankzij AltiVec optimalisaties in de MacOS X Aqua interface indrukwekkende snelheidsverbeteringen van een faktor 5 tot 10 behaald. Ook de boot-up en opstarttijden van programma's kunnen met behulp van AltiVec acceleratie merkbaar versneld worden:
Reliable sources close to the Darwin project and privvy to many of the technical details of recent builds of OS X have reported that with Beta now closing in on release, Altivec/Velocity Engine optimization has begun in earnest.
Apparently, these early G4 optimizations have accelerated the responsiveness of the Aqua interface by a factor of five to ten over G3s at indentical clock rates, and system boot-up times by 25-30%. Application launches are approximately twice as fast (with apps needing large memory allocations benefitting the most); sources at a major graphics application maker who shall remain nameless report that their popular application boots in 1/3 the time, and overall performance is improved by an average of 30% over their already Altivec-accelerated OS9 version.
There are reportedly still several major bugs related to Altivec and Altivec-enhanced memory management in OS X as it stands on Apple's internal development servers, but if these numbers bear out in the Beta release, momentum for Consumer may begin to pick up earlier and with more force than even the most optimistic of us had hoped.