map vs native for loop

JavaScript performance comparison

Revision 5 of this test case created by

Preparation code

<script src=""></script>

Benchmark.prototype.setup = function() {
  testArray = new Array(100);
  for(var i = 0; i < 100; i++) {
    testArray[i] = i;
  mapA = 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;


Preparation code output

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
jquery map
var result = $.map(testArray, double);
for loop map
var result = mapA(testArray, double);
built in js map
var result =;

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