getElementById vs. querySelector

JavaScript performance comparison

Revision 10 of this test case created

Info

Compare the speed of getElementById to querySelector

Preparation code

<p id="bar">Bar</p>
 

Preparation code output

Bar

Test runner

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Testing in unknown unknown
Test Ops/sec
getElementById
var bar = document.getElementById("bar");
pending…
querySelector
var bar = document.querySelector("#bar");
pending…
XPath
var bar = document.evaluate("//*[@id='bar']", document, null, 9, null).singleNodeValue;
pending…

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