Run results for: querySelector vs getElementsByClassName

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 14_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/85.0.4183.109 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 85

Operating system: iOS 14.0

Device Platform: Mobile

Date tested: 4 years ago

Test name	Executions per second
querySelector	2473652.8 Ops/sec
getElementsByClassName	2879072.8 Ops/sec

HTML Preparation code:

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

Tests:

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