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

JavaScript performance comparison

Revision 12 of this test case created by James Fuller

Info

comparing selector speed

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>

<article>
<p>A test</p>
<p><iframe></iframe></p>
<p>This is text</p>
</article>
 
<script>
  Benchmark.prototype.setup = function() {
    var article = document.querySelector('article');
    
  };
</script>

Preparation code output

A test

This is text

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Testing in unknown unknown
Test Ops/sec
find method
 
var hasFrame = $(article).find('iframe').length > 0 ? true : false;

 
 pending…
context method
 
var hasFrame = $('iframe', article).length > 0 ? true : false;
 pending…
non-context method
 
var hasFrame = $('iframe').length > 0 ? true : false;
 pending…

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