Backbuffer, Frontbuffer, Imagebuffers will differ in access speed. Just like Texturebuffers, where using Texture Flag 256 makes it much faster.
Continously reading and writing pixels is also bad, you rather should read all pixels into an array or bank, then compute and writepixelfast the whole array (has something to do with cache optimation on the CPU level).
Continously reading and writing pixels is also bad, you rather should read all pixels into an array or bank, then compute and writepixelfast the whole array (has something to do with cache optimation on the CPU level).