for vs forEach vs while vs Underscore.js (v389)

Revision 389 of this benchmark created by GeoTest on

Preparation HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>
<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..int
for (var i in values) {
  add(values[i]);
}
ready
cached, in for
for (var i = 0, len = values.length; i < len; i++) {
  add(values[i]);
}
ready
while
i = 0;
len = values.length
while (i++ < len) {
  add(values[i]);
}
ready
while ++i
i = -1;
len = values.length;
while (++i < len) {
  add(values[i]);
}
ready
for cached with ++i
for (var i = 0, len = values.length; i < len; ++i) {
  add(values[i]);
}
ready
while i-- with cached length
i = values.length;
while (i--) {
  add(values[i]);
}
ready
Underscore.js _.each
_.each(values, function(value) {
  add(value);
});
ready

Revisions

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