I'm not sure what you mean by "true" double buffering, but you can 
certainly draw to a bitmap that is not on the stage, and then just draw 
the content of that bitmap onto a visible one onEnterFrame. This does 
give performance increases according to reports of those using the 
technique.

Austin Haas wrote:
> My understanding is that true double buffering is impossible in Flash. There 
> would have to be support for it in the player. Environments that support 
> double buffering usually either have a mechanism explicitly built in, or they 
> at least allow you to draw to the screen between screen refreshes, so that 
> you can avoid problems like tearing. I don't believe there is any way to get 
> around tearing in Flash until they build in double buffering support.
>
> -austin
>
>   


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