for vs forEach (v224)

Revision 224 of this benchmark created on

Description

Is it faster to use the native forEach or just loop with for?

Preparation HTML

<script>
  var i, values = [],
      sum = 0;
  for (i = 0; i < 10000; i++) {
   values[i] = i;
  }
  
  function add(val) {
   sum += val;
  }
Array.prototype.forEach2 = function forEach(fn, thisContext) {
  var iterator = thisContext !== undefined ? fn.bind(thisContext) : fn,
    length = iterator ? this.length : 0,
    i;
  for (i = 0; i < length; i++) {
    iterator(this[i], i, this);
  }
};
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
forEach
values.forEach(add);
ready
fastForEach
values.forEach2(add);
ready

Revisions

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