Safari, Chrome also contain fast engines, so I decided to give them a try: which one is faster?
I chose the Depth of Field experiment, which requires a lot of calculation.
For FF 3.5, the result was not really enjoyable, it had an average of 1 frames per second on the first 32 second of the animation: I counted around 35 frames altogether. On Safari, it was around 70 frames, on Chrome, it as around 80 frames.
I think the result is obvious without any nifty graphs. :)