Run results for: getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (Linux; Android 6.0; LG-H815 Build/MRA58K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 YaBrowser/18.6.0.683.00 Mobile Safari/537.36

Browser: Yandex Browser 18

Operating system: Android 6.0

Device Platform: Mobile

Date tested: 5 years ago

Test name	Executions per second
getElementById	516726.2 Ops/sec
querySelector	244746.1 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;