grep vs pure js

JavaScript performance comparison

Revision 8 of this test case created

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>

 
<script>
  Benchmark.prototype.setup = function() {
    var ar = [1,2,3,4,5,6,7,8,9,10] ;
    
    function cond(e){return e == 10}
    
    Array.prototype.filter1 = function(fun /*, thisp */) { "use strict"; if (this == null){throw new TypeError();} var t = Object(this); var len = t.length >>> 0;  if (typeof fun != "function"){throw new TypeError();}  var res = []; var thisp = arguments[1]; for (var i = 0; i < len; i++) { if (i in t) { var val = t[i]; if (fun.call(thisp, val, i, t)) res.push(val); } } return res; };
  };
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
jQuery
 
$.grep(ar, cond);
 
 pending…
JS
 
ar.filter1(cond);
 pending…
native Array.filter
 
ar.filter(cond);
 
 pending…

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