A script for instrumenting rendering speed in an Ember.js Application.
You can install ember-renderspeed using Bower:
bower install ember-renderspeed
(Or if you wish, simply download the script from github and put it in your project.)
Include the script in your Ember.js project. Open your developer log and you'll see a nice expandable graph of rendering speeds:
You can use it to figure out what bits of rendering are taking the longest.