As I was reading the article about Flash Player 10.1 hardware acceleration for video and graphics, this is what I marked as important to myself, when developing for Flash player 10.1.
So in general I quote:
Although hardware compositing in Flash Player 10 improves performance in some cases, it can decrease performance in others. In addition, driver support varies widely on desktops. Given these challenges, Flash Player 10.1 on the desktop also composites SWF content included with the wmode=gpu embed parameter in software.
Flash Player 10.1 hardware rendering is automatically enabled on supported devices, and it’s not necessary to add the wmode=gpu embed parameter to enable it. However, when working with Flash Player 10.1, the wmode=opaquewmode=transparent embed parameters will disable hardware rendering or , causing the software to render the graphics.
Rendering on the GPU is not 100% pixel accurate with reference to the software renderer. Some content may look slightly chunkier when using the hardware renderer.
And for Flash 10.1 mobile development specific:
I found this page extremely interesting! Tips for improving graphics performance on mobile devices
