[Interest] Rotating objects in QML are killing performance

[Michael Andersen]

> I am using the Nvidia binary drivers (v304.51) so in order to double check
> that applications actually *were* vsynced, I ran glxgears.
>

Also forgot to mention that glxgears was indeed vsynced:
$ glxgears
Running synchronized to the vertical refresh.  The framerate should be
approximately the same as the monitor refresh rate.
268 frames in 5.0 seconds = 53.530 FPS
...
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