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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=511691" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 17_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/122.0.6261.89 Mobile/15E148 Safari/604.1
Browser:
Chrome Mobile iOS 122
Operating system:
iOS 17.3
Device Platform:
Mobile
Date tested:
2 years ago
Test name
Executions per second
getElementById
7738753.0 Ops/sec
querySelector
3510498.2 Ops/sec
getElementsByClassName
6595062.5 Ops/sec
querySelectorAll
2778359.8 Ops/sec
querySelector class
4069143.2 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;