Fastest array loops in Javascript

JavaScript performance comparison

Revision 263 of this test case created by

Preparation code

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.26/angular.min.js"></script>
<script>
  function someFn(ix) {
    try { 
        ix += 1; 
        if (ix < 0) {
           throw new Error('e');
        }
    } catch (e){
        alert(e);
    }
    return ix * 5 + 1 / 3 * 8;
  }
</script>
      
<script>
Benchmark.prototype.setup = function() {
    // Populate the base array
    var arr = [],
      a, i, len, arr2 = [];
    for (i = 0; i < 1000; i++) {
      arr[i] = i + 1;
    }
  Array.prototype.each = function (c) {
      var l = this.length;
      for (var i = 0; i < l; i++) {
        c(this[i], i, this);
      }
    };
  Array.prototype.each2 = function (c) {
      var l = this.length;
      for (var i = 0; i < l; i++) {
        c(this[i], i);
      }
    };

};
</script>

Preparation code output

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
For loop, basic
arr.each2(someFn);
pending…
While loop, basic
for (i = 0; i < arr.length; i++) {
  someFn(arr[i]);
}
pending…
Angular
angular.forEach(arr, someFn);
pending…

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