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Run results for:
getElementById vs querySelector ID vs getElementsByClassName vs querySelectorAll
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=489623" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120.0
Browser:
Firefox 120
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
getElementById
5430149.5 Ops/sec
querySelector
4123805.2 Ops/sec
getElementsByClassName
3714243.8 Ops/sec
querySelectorAll
1726908.1 Ops/sec
querySelector class
3913319.0 Ops/sec
HTML Preparation code:
<div id="test_element_id" class="test_element_class"></div>
Tests:
getElementById
var el = document.getElementById('test_element_id'); var className = el.className;
querySelector
var el = document.querySelector('#test_element_id'); var className = el.className;
getElementsByClassName
var el = document.getElementsByClassName('test_element_class')[0]; var className = el.className;
querySelectorAll
var el = document.querySelectorAll('.test_element_class')[0]; var className = el.className;
querySelector class
var el = document.querySelector('.test_element_class'); var className = el.className;