Native vs jQuery CSS selector queries

JavaScript performance comparison

Test case created by Neil Craig

Info

Testing and calculating the speed & overhead of jQuery over Native CSS selector queries.

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<div id="test">
  <ul>
    <li class="first">
    </li>
    <li class="second">
    </li>
    <li class="third">
    </li>
    <li class="fourth">
    </li>
    <ul>
</div>

Preparation code output

Test runner

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Testing in unknown unknown
Test Ops/sec
jQuery
$("#test");
$("ul");
$("ul li");
$(".first");
$("li.fourth");
pending…
Native
document.querySelectorAll("#test");
document.querySelectorAll("ul");
document.querySelectorAll("ul li");
document.querySelectorAll(".first");
document.querySelectorAll("li.fourth");
pending…

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