getElementsByClassName VS querySelectorAll (v73)

Revision 73 of this benchmark created on

Preparation HTML

<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;
</script>

Setup

function getElementsByClass(className, node) {
    var list = node.getElementsByTagName('*'),
      length = list.length,
      result = [],
      i;
  
    for (i = 0; i < length; i++) {
      if (list[i].className.search('\\b' + className + '\\b') != -1) {
        result.push(list[i]);
        //break;
      }
    }
  
    return result;
  }

Test runner

Ready to run.

Testing in
TestOps/sec
getElementsByClassName
nodes = document.getElementsByClassName('classname');
ready
querySelectorAll
nodes = document.querySelectorAll('.classname');
ready
Custom function
nodes = getElementsByClass('classname', document);
ready

Revisions

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