Flash 11 is supporting faster drawing and will make the game much faster. The current Facebook Classic should be fast enough for normal play, but can't display particles and seteffect because it would be too slow.
Graal facebook is taking 50% of my cpu on a 2ghz dual core processor.
Graal facebook is taking 50% of my cpu on a 2ghz dual core processor.
I've noticed the same problem on my Intel i3 M370 but it is only taking up around 35 - 40% of one of my cores on Google Chrome but 40 - 45% on Firefox.
Edit: Just checked and the native Graal client is only taking up around 20% meaning the flash version is much more CPU intensive than the native client but you'd expect it to be at least a little more intensive on Flash.