Render calculations outside the main thread and animation caching

[overw]

Hello,

I have two questions:
First. It takes some time between user tapped "curl" button and the view starts to curl with the animation. Is it possible to take this rendering calculations outside the main thread, so the UI won't froze?

Second. I noticed, that when animation performed for the first time in the app, it's sometimes have lower performance, than in next times. I guess, it's because it already cached when it performs for the next time. I wonder if it's possible to force-cache it before the real animation, so it would always worked smooth when it's curled for the first time.

Thanks.

[xissburg]

First: it's possible to move all the OpenGL stuff into another thread. That might increase the UI performance. This would be a quite big change to the project that should be performed very carefully.

Second: I also noticed this issue and I have no idea why that happens. Sometimes it happens once more, not only on the first time. However, I just tested it in my iPhone4S and there were no slow downs.