Dojo vs. jQuery vs. ExtJS 4.2
JavaScript performance comparison
Info
Simple test to benchmark variable allocation on inner and outer items.
Preparation code
<script src="http://cdn.sencha.com/ext/beta/4.2.0.265/ext.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/dojo/1.8.3/dojo/dojo.js"></script>
<script>
var dQuery;
require(['dojo/query'], function(query){
dQuery = query;
});