Run results for: getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (Linux; Android 5.1.1; Nexus 7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.99 Safari/537.36

Browser: Chrome 71

Operating system: Android 5.1.1

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
getElementById	231540.8 Ops/sec
querySelector	123182.1 Ops/sec

HTML Preparation code:

<div id="testElement"></div>

Tests:

getElementById
var el = document.getElementById('testElement'); var className = el.className;
querySelector
var el = document.querySelector('#testElement'); var className = el.className;