On Oct 10, 2009, at 1:14 AM, Gabriel Zachmann wrote:
So, is 20% CPU time for the GC thread normal?
That's a lot more than I'd expect based on what you're doing. Either you've got code you haven't shown us that's allocating a ton of objects during the animation, or some system framework (CoreAnimation, presumably) is allocating a lot of collectable objects.
I've used CA in some GC'd apps and haven't seen noticeable collection activity, but maybe I haven't used the same APIs as you.
What you need, I think, is to find out how to use Instruments or Shark to track only the allocation of collectable objects. Then you can see where that's occurring. I don't know how to do that, myself, but I'm sure someone here does.
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