AngularJS forEach vs Native forEach vs key vs for (v15)

Revision 15 of this benchmark created by Tom Taylor on

Description

Compare performance of the following iterative patterns:

AngularJS angular.forEach Native array.forEach Native for key in arr Native for loop

Should be quicker when caching length, also updated latest stable AngularJS! :)

Preparation HTML

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.18/angular.min.js">
</script>
<script>
  var len = 1000;
  var arr = new Array();
  while (len--) {
    arr[len] = len;
  }
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
Native forEach
arr.forEach(function(item) {
  item;
});
ready
AngularJS forEach
angular.forEach(arr, function(item) {
  item;
});
ready
for key in arr
for (var key in arr) {
  arr[key];
}
ready
for loop
for (i = arr.length - 1; i >= 0; i--) {
  arr[i];
}
ready
for loop, super-cached i and arr length, simpler!
var i,arrLen = arr.length;
for (i = 0; i < arrLen; i++) {
  arr[i];
}
ready
for loop, simple (with var)
for (var i = 0; i < arr.length; i++) {
  arr[i];
}
ready

Revisions

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