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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.9) Gecko/20100101 Goanna/4.6 Firefox/68.9 PaleMoon/28.12.0

Browser: Pale Moon (Firefox Variant) 28

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
By Class Name	8087952.5 Ops/sec
Query Selector	5872625.0 Ops/sec

HTML Preparation code:

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

Tests: