renderInContext creating memory that is not promptly released

Question

While debugging in instruments using 'ObjectAlloc' I'm noticing 7megs of memory being allocated for the renderInContext call, but it never is released. When I comment out the renderInContext call this doesn't happen, and future renderInContext calls does not continue to increase the memory allotment.

UIGraphicsBeginImageContext(contentHolder.bounds.size);
[contentHolder.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

Is there a way to force this memory to be released?

Answer 1

I found out how to release the renderInContext memory. Simply run the method calling renderInContext on Main Thread and that will release the allocated memory automatically.