Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<div data-fixture id="a">
</div>
<div data-fixture id="b">
</div>
<script>
  var a = document.getElementById("a"),
      b = $("#b");

  function addClasses(el, classes) {
    classes = classes.split(" ")
    for (var i = 0, l = classes.length; i < l; i++) {
      el.classList.add(classes[i]);
    }
  }
</script>
<script>
  Benchmark.prototype.setup = function() {
    var classesNum = 50
    classes = "foo0";
    for (var i = 1; i < classesNum; i++) {
      classes += " foo" + i;
    }
  };

  Benchmark.prototype.teardown = function() {
    $("[data-fixture]").attr("class", "");
  };
</script>

Preparation code output

Test runner

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for (var i = 0; i < classesNum; i++) {
  a.classList.add("foo" + i);
}

addClasses(a, classes);

b.addClass(classes);

for (var i = 0; i < classesNum; i++) {
  b.addClass("foo" + 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 by Rick Waldron on 11th April 2012
• Revision 2: published on 17th April 2012
• Revision 3: published by Dave Dopson on 27th September 2012
• Revision 4: published by m_gol on 2nd March 2013
• Revision 5: published by m_gol on 2nd March 2013
• Revision 6: published on 2nd March 2013
• Revision 7: published by m_gol on 2nd March 2013
• Revision 8: published by m_gol on 3rd March 2013
• Revision 9: published on 3rd March 2013
• Revision 10: published by m_gol on 3rd March 2013

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