jQuery $( '.class' ) vs getElementsByClassName( 'class' ) (v28)

Revision 28 of this benchmark created on

Preparation HTML

<div class="class1" id="id1"></div>
<div class="class2" id="id2"></div>
<div class="class3" id="id3"></div>
<div class="class4" id="id4"></div>
<div class="class5" id="id5"></div>
<div class="class6" id="id6"></div>
<div class="class7" id="id7"></div>
<div class="class8" id="id8"></div>
<div class="class2" id="id2"></div>
<div class="class2" id="id2"></div>
<div class="class9" id="id9"></div>
<div class="class10" id="id10"></div>
<div class="class11" id="id11"></div>
<div class="class12" id="id12"></div>
<div class="class13" id="id13"></div>
<div class="class14" id="id14"></div>
<div class="class15" id="id15"></div>
<div class="class16" id="id16"></div>
<div class="class17" id="id17"></div>
<div class="class18" id="id18"></div>
<div class="class2" id="id2"></div>
<div class="class2" id="id2"></div>
<div class="class19" id="id19"></div>
<div class="class20" id="id20"></div>
<div class="class21" id="id21"></div>
<div class="class22" id="id22"></div>
<div class="class23" id="id23"></div>
<div class="class24" id="id24"></div>
<div class="class2" id="id2"></div>
<div class="class25" id="id25"></div>
<div class="class26" id="id26"></div>
<div class="class27" id="id27"></div>
<div class="class28" id="id28"></div>
<div class="class2" id="id2"></div>
<div class="class29" id="id29"></div>
<div class="class30" id="id30"></div>
<div class="class2" id="id2"></div>
<div class="class2" id="id2"></div>
<div class="class2" id="id2"></div>
<div class="class2" id="id2"></div>
<div class="class2" id="id2"></div>
<div class="class2" id="id2"></div>
<div class="class2" id="id2"></div>
<div class="class2" id="id2"></div>
<div class="class2" id="id2"></div>
<div class="class2" id="id2"></div>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>

Test runner

Ready to run.

Testing in
TestOps/sec
jQuery CSS Class Selector
var x = $('.class2');
ready
getElementsByClassName to jQuery Object
var x = $(document.getElementsByClassName('class2'));
ready
getElementsByClassName to jQuery Object
var jQueryObject = $(Array.prototype.slice.call(document.getElementsByClassName('class2')));
ready
getElementsByClassName to jQuery Object
var collection = Array.prototype.slice.call(document.getElementsByClassName('class2'));

if (collection && collection.length > 0) {
  for (var i = 0; i < collection.length; i++) {
    $(collection[i]);
  }
}
ready
getElementsByClassName to jQuery Object using NodeList and Loop
var x = document.getElementsByClassName('class2');
var length = x.length;

if (length && length > 0) {
  for (i = 0; i < length; i++) {
    $(x[i]);
  }
}
ready

Revisions

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