Run results for: querySelectorAll vs. getElementsByClassName

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Firefox/135.0

Browser: Firefox 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

getElementsByClassName

15.3M/s

querySelectorAll

4.1M/s

View exact numbers

Test name	Executions per second
✓ getElementsByClassName	15,255,294 Ops/sec
querySelectorAll	4,115,993 Ops/sec

HTML Preparation code:

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

Tests: