https://turbulenz.com/#!games/scorerush Lots of pauses, even with incremental GC on. Perhaps TI recompilations? In Chrome the game is smooth. Loading it with Firefox, they show a warning, > Good news! Your browser supports HTML5 Canvas and can run this game without needing to install the Turbulenz Engine. Bad news! The performance of your game may be poor because this browser is not yet optimised for rendering complicated HTML5 content. We currently reccomend installing the Turbulenz Engine or using Google Chrome. It takes less than a minute! Reminiscent of the "best viewed in IE" days. Although here it is kind of ironic, the game takes twice as much memory to run in Chrome (800MB for a 2D shooter..?) and perhaps because of that, crashes more often than not for me, at least in Firefox it doesn't crash. If the pauses were fixed, we would have a better experience than Chrome here.

Not tracking for k9o for now. Hopefully the dep bugs will fix it, though.

Bug 750834 seems to have fixed it: looking at the frame profile, there aren't any jit compilations after the GCs and the frame rate stays much smoother (aside for GC pauses which are ~50ms).