for vs forEach

JavaScript performance comparison

Revision 16 of this test case created by RubaXa

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var i, values = [],
      sum = 0;
  for (i = 0; i < 10000; i++) {
    values[i] = i;
  }
  
  function add(val) {
    val * 2;
  }
  
  function each(obj, fn, context) {
    for (var i = 0, n = obj.length; i < n; i++){
      fn.call(context, obj[i], i, obj);
    }
  }

};
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
forEach
values.forEach(add);
pending…
for loop, reverse
for (i = values.length - 1; i >= 0; i--) {
  add(values[i]);
}
pending…
for loop, reverse 2
for (i = values.length; i--;) {
  add(values[i]);
}
pending…
forEach function
each(values, add);
pending…

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Revisions

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