Info

Some of the previous revisions were incrementing the amount of children in parentdiv after each loop, resulting in slower code the longer the benchmark ran.

This revision does not have that issue.

Preparation code

<div id="parent">
</div>
<script type=text/js>
var parentNode = document.getElementById('parent'), i;
for (length = 100, i = length; i > length; i--) {
  parentNode.appendChild(document.createElement('div'));
}
</script>
<script>
  Benchmark.prototype.setup = function() {
    var parentNode = document.getElementById('parent'), objs = parentNode.getElementsByTagName('div');
  };
</script>

Preparation code output

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var _len = objs.length, obj;
for (var i = 0; i < _len; i++) {
  obj = objs[i];
}

var _len, objsArray = [], i, obj;
for (i = 0, _len = objs.length, objsArray.length = _len; i < _len; i++) {
  objsArray[i] = objs[i];
}
for (i = 0, _len = objsArray.length; i < _len; i++) {
  obj = objsArray[i];
}

var objsArray = Array.prototype.slice.call(objs), _len = objsArray.length, i, obj;
for (i = 0; i < _len; i++) {
  obj = objsArray[i];
}

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published on 4th December 2012
• Revision 2: published on 4th December 2012
• Revision 3: published by convert HTML collection into array 2 on 5th December 2012
• Revision 4: published by Cong Liu on 5th December 2012
• Revision 6: published by Cong Liu on 11th December 2012
• Revision 7: published on 16th December 2012
• Revision 8: published on 16th December 2012
• Revision 9: published on 16th February 2013
• Revision 10: published by Cong Liu on 8th March 2013

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