for vs forEach (v303)

Revision 303 of this benchmark created by CSS style setter 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;
  }
</script>

Test runner

Ready to run.

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

Revisions

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