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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0

Browser: Firefox 133

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

getElementsByClassName

6.1M/s

querySelector

4.9M/s

View exact numbers

Test name	Executions per second
✓ getElementsByClassName	6,078,603 Ops/sec
querySelector	4,922,650 Ops/sec

HTML Preparation code:

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

Tests: