getElementsByClassName vs jQuery $ selector vs querySelectorAll

Benchmark created by Blake Elshire on

Preparation HTML

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<div>
  <ul>
    <li><a href="#" name="name" class="classname">item 1</a></li>
    <li><a href="#" name="name" class="classname">item 2</a></li>
    <li><a href="#" name="name" class="classname">item 3</a></li>
    <li><a href="#" name="name" class="classname">item 4</a></li>
    <li><a href="#" name="name" class="classname">item 5</a></li>
    <li><a href="#" name="name" class="classname">item 6</a></li>
    <li><a href="#" name="name" class="classname">item 7</a></li>
    <li><a href="#" name="name" class="classname">item 8</a></li>
    <li><a href="#" name="name" class="classname">item 9</a></li>
    <li><a href="#" name="name" class="classname">item 10</a></li>
  </ul>
</div>
<script>
  var nodes, len, i;
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
getElementsByClassName
nodes = document.getElementsByClassName('classname');

len = nodes.length;
for (i = 0; i < len; i++) {
 nodes[i].setAttribute("target", "_blank");
}
ready
querySelectorAll
nodes = document.querySelectorAll('[class = classname]');

len = nodes.length;
for (i = 0; i < len; i++) {
 nodes[i].setAttribute("target", "_blank");
}
ready
jQuery $ Selector
nodes = $(".classname");

len = nodes.length;
for (i = 0; i < len; i++) {
 nodes[i].setAttribute("target", "_blank");
}
ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

  • Revision 1: published by Blake Elshire on