Run results for: querySelectorAll vs. getElementsByClassName

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0

Browser: Firefox 115

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

getElementsByClassName

5.1M/s

querySelectorAll

1.2M/s

View exact numbers

Test name	Executions per second
✓ getElementsByClassName	5,083,954 Ops/sec
querySelectorAll	1,219,973 Ops/sec

HTML Preparation code:

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

Tests: