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Run results for:
getElementById vs querySelector vs getElementsByClassName....
Test performance of different ways of get just one particular DOM element
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=626130" 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/145.0.0.0 Safari/537.36
Browser:
Chrome 145
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 months ago
Test name
Executions per second
getElementById
28527276.0 Ops/sec
getElementsByTagName
15011052.0 Ops/sec
querySelector
5871418.0 Ops/sec
getElementsByClassName
12033394.0 Ops/sec
HTML Preparation code:
<div id="testdiv"> <div id="unique" class="unique" name="unique" data-unique="1">test</div> </div>
Script Preparation code:
var i, imax; var doc = document;
Tests:
getElementById
var test = doc.getElementById('unique');
getElementsByTagName
var test = doc.getElementsByTagName('div')[1];
querySelector
var test = doc.querySelector('#unique');
getElementsByClassName
var test = doc.getElementsByClassName('unique')[0];