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

JavaScript performance comparison

Revision 3 of this test case created

Preparation code

<script src="">
  Benchmark.prototype.setup = function() {
    testArray = {};
    for (var i = 0; i < 100; i++) {
      testArray[i] = i;

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

      return newArray;

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


Preparation code output

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Testing in unknown unknown
Test Ops/sec
javascript map
var result = map(testArray, double);
jquery map
var result = $.map(testArray, double);
var result = $.each(testArray, double);

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