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Run results for:
getElementById vs querySelector vs getElementsByClassName vs getElementsByName
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=615601" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:141.0) Gecko/20100101 Firefox/141.0
Browser:
Firefox 141
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Benchmark engine:
Benchmark.js
querySelector
29.8M/s
getElementById
28.0M/s
getElementsByName
22.0M/s
getElementsByTagName
18.8M/s
getElementsByClassName
17.3M/s
View exact numbers
Test name
Executions per second
✓
querySelector
29,841,352 Ops/sec
getElementById
27,980,548 Ops/sec
getElementsByName
21,977,284 Ops/sec
getElementsByTagName
18,766,696 Ops/sec
getElementsByClassName
17,274,032 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('testdiv').childNodes[0].innerHTML;
getElementsByTagName
var formelem = doc.getElementById('testdiv').getElementsByTagName('div')[0].innerHTML;
querySelector
var test = doc.getElementById('testdiv').querySelector('.unique').innerHTML;
getElementsByClassName
var test = doc.getElementById('testdiv').getElementsByClassName('unique')[0].innerHTML;
getElementsByName
var test = doc.getElementsByName('unique')[0].innerHTML;