jQuery .find() vs. context selector

JavaScript performance comparison

Revision 9 of this test case created

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() {
    document.createElement('article');
    var article = document.getElementsByTagName('article')[0];
   
};
</script>

Preparation code output

A test

This is text

Test runner

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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…
children method
var hasFrame = $(article).children('iframe').length > 0 ? true : false;
pending…
context method 2
var hasFrame = $('.article iframe').length > 0 ? true : false;
pending…

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