My HTML5/JavaScript game (for the windows store) is lagging constantly! I have used barely any resources and I have used gsap for animating the bullets and mines. For example: http://203.81.207.90/default.html in Chrome enabling everything under rendering shows the lag immediately (the background and mines lag the most).
the problem is the tiny interval (10ms) used in most setInterval()'s.
increasing the interval should help and since javascript is a single threaded language, using lots of timers basically queue's them (performance issue) try using less timers by putting multiple functions in single timers