Run results for: getElementById vs querySelector

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.0 Safari/605.1.15

Browser: Safari 12

Operating system: Mac OS X 10.14

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
getElementById	2549675.0 Ops/sec
querySelector	2157944.0 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;