for vs array-foreach

JavaScript performance comparison

Revision 8 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var array = Array(31).join('x').split('');
   
    function callback(value, index, object) {
      return value;
    }
};
</script>

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Testing in unknown unknown
Test Ops/sec
for-loop
for (var index in array) {
  callback(array[index], index, array);
}
pending…
Array#forEach
for(var index = 0; index = array.length; index++) {
  callback(array[index], index, array);
}
pending…

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