Do you worry about your frames-per-second? At least I do. So in general you can do something like this:
[SWF(frameRate='1000',width='800',height='600',backgroundColor='0xCCCCCC')]
This results for me in a constant framerate of 250. It seems to me that there is a limit that Flash puts on the framerate. But 250 is lame to me. Why not go for the 1000? It was a lucky find because I used stage.frameRate = 25; at one point and then wanted to switch back to 1000. But the result was not a constant framerate of 250 but… 976. Seems to me that Flash is not using a limit at this point. Sweet :o)
Update:
You can try using [SWF(frameRate='1000')] and -default-frame-rate 1000 as a compiler argument. Both will result in the same if you do trace( stage.frameRate ). The maximum that you can set is 0xff so Adobe is using a byte here. But inside the Flash player you are allowed to use more than a byte.
Serioulsly why would you need such high framerates? Your screen probably only displays 60 fps at most, so why waste CPU time to calculate 1000 frames a second when you only see 60.