Run results for: querySelector(".class") vs getElementsByClassName("class")[0]

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36

Browser: Chrome 81

Operating system: Mac OS X 10.15.3

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
querySelector	4255662.5 Ops/sec
getElementsByClassName	3323995.2 Ops/sec

HTML Preparation code:

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

Tests: