Angular foreach vs Underscore foreach vs native For Loop vs reverse native for loop

JavaScript performance comparison

Revision 39 of this test case created by belikemike

Preparation code

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.0/angular.min.js"></script>
<script src="http://underscorejs.org/underscore-min.js"></script>

      
<script>
Benchmark.prototype.setup = function() {
  var sum = 0;
  var arr = [];
  var myFunc = function(el) {
    el += 1;
  }
  for (var i = 0; i < 100000; i++) {
    arr.push(i)
  }

};
</script>

Preparation code output

<script src="http://underscorejs.org/underscore-min.js"></script>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
functional while
var doWhile = function (arr) {
  var arrLen = arr.length;
  var item = 0;
  while (arrLen > 0) {
    arrLen--;
    myFunc(arr[arrLen]);
  }
}
doWhile(arr);
pending…
underscore foreach
_.each(arr, myFunc);
pending…
angular foreach
angular.forEach(arr, myFunc);
pending…
for loop
for (var i = 0; i < arr.length; i++) {
  myFunc(arr[i]);
};
pending…
native foreach
var item = 0;
for (var a in arr) {
  myFunc(arr[a]);
}
pending…
native while
var arrLen = arr.length;
var item = 0;
while (arrLen > 0) {
  arrLen--;
  myFunc(arr[arrLen]);
}
pending…
no functional overhead
var arrLen = arr.length;
var item = 0;
while (arrLen > 0) {
  arrLen--;
  ++arr[arrLen];
}
pending…

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Revisions

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