You can also mix the two, write typical JS and use a high-performance library from JS for something specific, like physics http://kripken.github.io/box2d.js/we

You can also mix the two, write typical JS and use a high-performance library from JS for something specific, like physics http://kripken.github.io/box2d.js/webgl_demo/box2d.html http://kripken.github.io/box2d.js/webgl_demo/box2d.html