Most of us are familiar with CPU consuming problem in Flash applications. There are cases, when you have nothing to do with, but in few cases you can use well known solution – cacheAsBitmap. It prevents object re-rendering in case a shape and content are never changed.

  There is a case when caching of Sprite object doesn't always solve the problem. What if your sprite contains different types of elements and all elements are static (no shape or position changes)? Does caching as bitmap of the Sprite will help to improve object rendering performance? The answer is yes, but there is a little nuance.