jQuery .find() vs. context selector vs non-context selector vs. native Javascript selector

JavaScript performance comparison

Revision 45 of this test case created by Tom

Preparation code

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<article>
	<p>A test</p>
	<p><ins></ins></p>
	<p>This is text</p>
</article>
      
<script>
Benchmark.prototype.setup = function() {
  var $article = $('article');

};

Benchmark.prototype.teardown = function() {
  $article = null;

};
</script>

Preparation code output

<article> <p>A test</p> <p><ins></ins></p> <p>This is text</p> </article>

Test runner

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Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
find method (node context)
var has = $($article[0]).find('ins').length > 0 ? true : false;
pending…
find method (jquery context)
var has = $article.find('ins').length > 0 ? true : false;
pending…
context node
var has = $('ins', $article[0]).length > 0 ? true : false;
pending…
context jquery
var has = $('ins', $article).length > 0 ? true : false;
pending…
cascade
var has = $('article ins').length > 0 ? true : false;
pending…
context (no cached)
var has = $('ins', 'article').length > 0 ? true : false;
pending…
select and find
var has = $('article').find('ins').length > 0 ? true : false;
pending…
'parent > child' selector
var has = $('article > ins').length > 0 ? true : false;
pending…
Native selector
var oArticle = document.getElementsByTagName("article")[0],
    has = oArticle.getElementsByTagName("ins").length > 0 ? true : false;
pending…

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A test

This is text