This AddOn really gives you a nice, high level overview of what's going on and where to optimize. I may just add that for lower level debugging WebGL Inspector[1] is also tremendously helpful.
Also, cool to see my game[2] as an example for the bad overdraw situation :)
Also, cool to see my game[2] as an example for the bad overdraw situation :)
[1] https://chrome.google.com/webstore/detail/webgl-inspector/og... [2] http://phoboslab.org/xibalba/