[watmough]

My 2007 MBP manages a decent 20 fps but starts pretty slow and averages 15.

That's a 2.4GHz C2D. Need to try it on my i52400.

[mbebenita]

You should give the latest version a try, we improved the performance considerably.

[watmough]

Interestingly, my i52400 only manages 25 fps (average over 1 minute). Hmmm. Ahhh, it's only single-threaded.

Is that intentional, or a problem with Nightly?