Fast Array Foreach

JavaScript performance comparison

Revision 178 of this test case created by Alexander Karagulamos and last updated

Preparation code

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

      
<script>
Benchmark.prototype.setup = function() {
  Array.prototype.customForEach = function(callback) {
    var self = this;
    var arraySize = self.length;
  
    for (var idx = 0; idx < arraySize; idx++) {
      callback(self[idx], idx, self)
    }
  }
  
  // Populate the base array
  var arr = [];
  for (var i = 0; i < 1000; i++) {
    arr[i] = i;
  }
  
  function someFn(item) {
    return item * 3 * 8;
  }

};
</script>

Preparation code output

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Array.ForEach
arr.forEach(someFn)
pending…
Fast Custom Foreach
arr.customForEach(someFn);
pending…
JQuery.each
$.each(arr, function(index, item) {
  someFn(item);
});
pending…
For
for (var i = 0, len = arr.length; i < len; i++) {
  someFn(arr[i]);
}
pending…

Compare results of other browsers

Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL.

0 Comments