Headless Qunit
Update events.js from Backbone v1.1.2
(Keep local Two modifications)
One forEach
Stats
Kill bubbling
Rework Children
Optimize SVG renderer

Use plain for loop instead of map (creates a context switch on every iteration), round the values faster, and remove one layer of call redirection.
Externalize rounding function

It's actually a bit faster this way
Fix one test
Fix XHR errors

Need to open the request before setting attributes.