javascript map vs jquery map vs jquery each vs javascript every vs javascript forEach

JavaScript performance comparison

Test case created by najamkhn

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<script>
  Benchmark.prototype.setup = function() {
    testArray = new Array(100);
    for (var i = 0; i < 100; i++) {
      testArray[i] = i;
    }

    map = function(array, mapFunction) {
      var newArray = new Array(array.length);
      for (var i = 0; i < array.length; i++) {
        newArray[i] = mapFunction(array[i]);
      }

      return newArray;
    }

    double = function(x) {
      return x * 2;
    }

  };
</script>

Preparation code output

Test runner

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Testing in unknown unknown
Test Ops/sec
javascript map
var result = map(testArray, double);
pending…
jquery map
var result = $.map(testArray, double);
pending…
each
var result = $.each(testArray, double);
pending…
every
testArray.every(function(elem, index) {
  double(elem);
  return true;
});
pending…
forEach
testArray.forEach(function(elem) {
  double(elem);
});
pending…

Compare results of other browsers

Revisions

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1 comment

Dmitry commented :

Nice comparison, but how does it even possible such Chromiim performance and low IE 10 performance compared to IE 9?

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