Core Image Slowdown
I'm having major issues with composition slowdown when using even a really really simple Core Image filter kernel. The attached QTZ has the iSight feeding a Queue, which is rendered onto billboards with an Iterator. Optionally, the image is pre-filtered through a simple luma CIFilter, before going into the Queue.
Turn off the CIFilter, and I get more-or-less rock-solid 60fps. Turn it on, and the framerate fluctuates wildly, sometimes slowing to as little as 10fps for a couple of seconds, then going back up to 60fps. The CIFilter is only working on a tiny image, since I resize it before passing it through the filter.
Can anyone else duplicate this?
I'm running on a MacBook Pro
Snow Leopard 10.6.1
NVIDIA GeForce 9600M GT 512MB
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