Do everyone replace bit.bitmapData to create animations?
Can replacing bit.bitmapData to create animations effectively enable GPU accelerated rendering?
By the way, is the movieclip in the SWF library created by replacing bit.bitmapData to create animations?
Yes. BitmapData internally stores a texture to enable GPU acceleration, so using a Bitmap and replacing the bitmapData property with different BitmapData should make the animation GPU accelerated.
No. When using OpenFL and SWF, the MovieClip class is capable of drawing vector graphics, so it does not work by displaying multiple BitmapData objects in sequence like you’ve described.