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Run results for:
getElementsByClassName()[0] vs querySelectorAll
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<iframe src="https://measurethat.net/Embed?id=595933" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:138.0) Gecko/20100101 Firefox/138.0
Browser:
Firefox 138
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
By Class Name
5618364.5 Ops/sec
Query Selector
3699540.5 Ops/sec
HTML Preparation code:
<div class="test"></div>
Tests:
By Class Name
document.getElementsByClassName('test')[0];
Query Selector
document.querySelector('.test');