getElementById vs. querySelector

JavaScript performance comparison

Revision 21 of this test case created by

Preparation code

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<p id="foo">Foo</p>
<p id="bar">Bar</p>
<p id="baz">Baz</p>
    

Preparation code output

<p id="foo">Foo</p> <p id="bar">Bar</p> <p id="baz">Baz</p>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
getElementById
var bar = document.getElementById("bar");
pending…
querySelector
var bar = document.querySelector("#bar");
pending…
querySelectorAll
var bar = document.querySelectorAll("#bar"); 
pending…
jquery get(0)
var bar = $("#bar").get(0);
pending…
jquery[0]
var bar = $("#bar")[0];
pending…
jquery context
var bar = $(".user-output").find("#bar")[0];
pending…

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Foo

Bar

Baz