Run results for: querySelector vs getElementsByClassName

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36 OPR/71.0.3770.97 (Edition beta)

Browser: Opera 71

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
querySelector	3035626.0 Ops/sec
getElementsByClassName	3685427.0 Ops/sec

HTML Preparation code:

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

Tests:

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