Flash performance for game dev: native render VS BitmapData framebuffer

Question

I develop a 2D shooter game with lots of objects and aggressive scrolling.

QUESTION: which way is better?

CHOICE 1 - use nativ

Answer 1

I have a lowend laptop, Intel Mobile 1.6Ghz/512MB, Firefox 3.5.x, Flash10.0.32.18, WinXP

I can cleary see a big difference.

native version: less than 10sec goes up to CPU99% and movement is jerky. custom version: stays below

Btw, is there any chance to get example code as an exercise.