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Laggy here too. Same FF build, on ubuntu. Fast in chromium. Sidenote, does anyone know of a good JS profiler?

Edge detection is easy, especially on images with small numbers of colors in large swaths.

I've found firebug's profiler to be quite useful:

http://michaelsync.net/2007/09/10/firebug-tutorial-logging-p...

hi, u r right - not really performant in FF, developed/tested it on chrome, safari and iPad safari (which my kids love, it's mostly coded for them) so far .. will look into FF and make some performance enhancements.

i commented out a console.log(touch.pageX); and now the performance in FF seems to be much more smoother? can it be? it did not even get executed? strange.

It's now fast for a few seconds, then gets slow shortly after the footer loads.

after a long hard fight i made it faster (overall but especially in FF) .... the CanvasPixelArray Object (which is not an Array in Webkit ....) is a real bastard.

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