Traverse from Cached Selector VS Id Selector

JavaScript performance comparison

Test case created by Jeremy Smith

Info

http://stackoverflow.com/q/10424975/296889

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<div>
  <div id="MyContainer" class="container">
    <button class="clickedButton">
    </button>
  </div>
</div>
<script>
Benchmark.prototype.setup = function() {
    var link = $('.clickedButton');
};
</script>

Preparation code output

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

Testing in unknown unknown
Test Ops/sec
From Cached Selector
var container = link.closest('.container');
pending…
From ID Selector
var container = $('#MyContainer');
pending…
from Native ID selector
var container = $(document.getElementById('MyContainer'));
pending…

Compare results of other browsers

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:

0 comments

Add a comment