Run results for: getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (Linux; Android 7.1.1; SAMSUNG-SM-T377A Build/NMF26X) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.109 Safari/537.36

Browser: Chrome 65

Operating system: Android 7.1.1

Device Platform: Samsung SM-T377A

Date tested: 6 years ago

Test name	Executions per second
getElementById	258900.2 Ops/sec
querySelector	204209.1 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;