Run results for: querySelector vs getElementsByClassName

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3493.3 Safari/537.36 OPR/56.0.3031.0 (Edition developer)

Browser: Opera 56

Operating system: Linux

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
querySelector	2290564.0 Ops/sec
getElementsByClassName	2837414.0 Ops/sec

HTML Preparation code:

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

Tests:

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