Fast Array Foreach

JavaScript performance comparison

Revision 81 of this test case created by me

Preparation code

<script src="http://underscorejs.org/underscore-min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>

      
<script>
Benchmark.prototype.setup = function() {
    // Populate the base array
    var arr = [];
    for (var i = 0; i < 1000; i++) {
      arr[i] = i;
    }
  
    function someFn(i) {
      return i * 3 * 8;
    }

};
</script>

Preparation code output

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

Test runner

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Java applet disabled.

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

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Revisions

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