Run results for: querySelector() vs getElementsByClassName()[0]

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36

Browser: Chrome 132

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

querySelector

22.7M/s

getElementsByClassName

16.7M/s

View exact numbers

Test name	Executions per second
✓ querySelector	22,660,412 Ops/sec
getElementsByClassName	16,678,351 Ops/sec

HTML Preparation code:

<div class="test"></div>

Tests: