for vs forEach (v214)

Revision 214 of this benchmark created on

Description

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

Preparation HTML

<script>
  var values = ['a','b','c'];
  var obj = {}
  var i;
  function set(val) {
      obj[val] = 5;
  }
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
forEach
values.forEach(set);
ready
for loop, simple
for (i = 0; i < values.length; i++) {
 set(values[i]);
}
ready
for loop, cached length
var len = values.length;
for (i = 0; i < len; i++) {
 set(values[i]);
}
ready
for loop, reverse
for (i = values.length - 1; i >= 0; i--) {
 set(values[i]);
}
ready
forEach more local
(function() {
 var sum = 0;
 values.forEach(function(val) {
  sum += val;
 });
})();
ready

Revisions

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