systemed/iD — pull request #460 by tmcw (2013-01-22 17:24:34+00:00)
Title: Fast zooming based on transforms.

* Replaces the mouseup-tranformStart method with a redraw debouced by 1/5s

This makes zooming of large datasets much faster in Chrome & Safari and a bit faster in Firefox, though FF is more or less a lost cause.