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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
Go to the benchmark
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=507343" 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/121.0.0.0 Safari/537.36
Browser:
Chrome 121
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
getElementById
3.5M/s
querySelector
2.1M/s
getElementsByName
2.1M/s
getElementsByTagName
1.9M/s
getElementsByClassName
1.8M/s
View exact numbers
Test name
Executions per second
✓
getElementById
3,548,125 Ops/sec
querySelector
2,095,441 Ops/sec
getElementsByName
2,077,451 Ops/sec
getElementsByTagName
1,858,496 Ops/sec
getElementsByClassName
1,771,600 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;