jQuery .find() vs. context selector vs selector

JavaScript performance comparison

Revision 11 of this test case created by Mike Chu

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>

Preparation code output

A test

This is text

Test runner

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Testing in unknown unknown
Test Ops/sec
find method
// async test
var hasFrame = $("article").find("iframe").length > 0 ? true : false;
pending…
context method
var hasFrame = $("iframe", "article").length > 0 ? true : false;
pending…
selector only
var hasFrame = $("article > iframe").length > 0 ? true : false;
pending…

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