CATransition slow and picture jump when do transition on a large size picture

I used CATransition to do transition between two images. But I found that if the image file size is large, the transition will be slow or jump开发者_JS百科.

Especially on case:

type:kCATransitionMoveIn, kCATransitionPush, kCATransitionReveal, 
subtypes:kCATransitionFromLeft, kCATransitionFromRight, kCATransitionFromTop, kCATransitionFromBottom

Is there anyone met the same problem?

any comments?