that's exactly what I am trying to find out. And since GC is a documented issue I want to know if that's causing me issues or if it's just inefficient code/design.
I suspect GC in a number of cases because I can have 60FPS and hardly any cpu usage, but still get pauses happening as a sprite just floats around the screen. and it happens rhythmically.... like smooth for a second or 2, then stutter, stutter and again, the exact same issue...
Oh the joys of HTML5 gaming.