jQuery.each vs _.each vs for loop vs array.forEach

JavaScript performance comparison

Revision 3 of this test case created by tylor

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.4.4/underscore-min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/1.0.1/lodash.min.js"></script>
<script>
  var lodash = _.noConflict();
  var array = $('*').get();
  var callback = function(item, index) {
    e = item;
  };
  var callbackjQ = function(index, item) {
    e = item;
  };
</script>
<script>
Benchmark.prototype.setup = function() {
    var $ = window.$;
    var _ = window._;
    var lodash = window.lodash;
   
    var e;
    var array = window.array;
};
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
jQuery.each
$.each(array, callbackjQ)
pending…
_.each (underscore)
_.each(array, callback);
pending…
_.each (lodash)
lodash.each(array, callback);
pending…
for loop
for (var i = 0, len = array.length; i < len; i++) { e = array[i]; }
pending…
array.forEach
array.forEach(callback);
pending…

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