All of us know that if the flash do too much calculation, it will be lag or very lag in playing the movie with SWF. So, I'm just going to ask how to reduce lag. Don't answer "Just don't make the flash do too much!" That's stupid.

So I have some solutions inside my head that I haven't try it yet.

1. Making the canvas smaller?
2. Export the final movie into FLV or other? (I think this one should works)

Or any other better solutions?

Thank you Sir and Ma'am

There is no other way. It depends on the usage limit of your computer, and the file size.
If your computer is fast, and has a high usage, then lags may be reduced.