Originally Posted by Chucker
Then, as a developer, I'd be very curious how to activate it. You can't.
I just got hold of Xbench, and ran it on my 1.83 GHz Core Duo MacBook and my girlfriend's 12" 1.5 GHz PB G4, both with and without Q2DE enabled.
On the MacBook, running 10.4.9, it didn't make any difference at all. This isn't too suprising given how Q2DE works and that the MacBook has an integrated GPU - the main aim of Q2DE is to exploit the much faster GPU dedicated VRAM, and minimise the amount of data sent over the slower system bus to the GPU. The MacBook doesn't have dedicated VRAM, so there's no advantage to be had.
However, the 12" PB G4 (running 10.4.8) does have dedicated VRAM, and the difference in performance with Q2DE on is significant. Xbench has 5 Quartz tests: Line, Rectangle, Circle, Bezier and Text.
Results were as follows:
So, the first four tests are faster with it on, Line and Circle especially so. Unfortunately, as I mentioned in an earlier post, text performance falls significantly.
Xbench also has a User Interface Test, and here the situation is even worse:
UI score: 22.17
UI score: 2.58