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Run results for:
getElementById + getElementByClassName vs querySelector
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=594187" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36 Edg/134.0.0.0
Browser:
Chrome 134
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
getElementById + getElementByClass
7985877.5 Ops/sec
querySelector
5509828.5 Ops/sec
HTML Preparation code:
<div id="testElement"> <div class="testElementChild"></div> <div class="testElementChild"></div> <div class="testElementChild"></div> <div class="testElementChild"></div> <div class="testElementChild"></div> </div>
Tests:
getElementById + getElementByClass
var el = document.getElementById('testElement'); var children = el.getElementsByClassName('testElementChild'); var length = children.length;
querySelector
var el = document.querySelector('#testElement .testElementChild'); var length = el.length;