Run results for: querySelectorAll vs. getElementsByClassName

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0

Browser: Firefox 115

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

getElementsByClassName

8.2M/s

querySelectorAll

1.9M/s

View exact numbers

Test name	Executions per second
✓ getElementsByClassName	8,162,647 Ops/sec
querySelectorAll	1,942,435 Ops/sec

HTML Preparation code:

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

Tests: