Run results for: querySelector vs getElementsByClassName

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 12_0 like Mac OS X) AppleWebKit/604.1.34 (KHTML, like Gecko) CriOS/68.0.3440.83 Mobile/16A366 Safari/604.1

Browser: Chrome Mobile iOS 68

Operating system: iOS 12.0

Device Platform: Mobile

Date tested: 5 years ago

Test name	Executions per second
querySelector	1984847.0 Ops/sec
getElementsByClassName	2709188.0 Ops/sec

HTML Preparation code:

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

Tests:

querySelector
document.querySelector(".test")
getElementsByClassName
document.getElementsByClassName(".test")