“Blitting is a higher-performance alternative to using the built-in display list in Adobe Flash for drawing objects on the Stage. This technique involves copying the individual pixels of an existing image directly on to the screen—a bit like painting all of your game’s spaceships and monsters onto a canvas.”
It’s an introduction to blitting for developers using the Flash authoring environment (Flash IDE); you’ll learn how to take a regular movie clip from the library, cache it as a series of Bitmaps, and draw it (blit it) to the screen.
Why bother? Because to blit an object is much faster than to use
Click here to start reading. If you’ve got a free Adobe account, you can comment on the article itself; otherwise, feel free to ask any questions in the comments to this post