Run results for: querySelectorAll vs. getElementsByClassName

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:122.0) Gecko/20100101 Firefox/122.0

Browser: Firefox 122

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

getElementsByClassName

8.5M/s

querySelectorAll

1.6M/s

View exact numbers

Test name	Executions per second
✓ getElementsByClassName	8,517,178 Ops/sec
querySelectorAll	1,611,051 Ops/sec

HTML Preparation code:

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

Tests: