Run results for: instanceof vs tagname

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 5 months ago

Test name	Executions per second
instanceof	350626.4 Ops/sec
tagName	414105.2 Ops/sec

HTML Preparation code:

<div><iframe></iframe></div>

Tests:

instanceof
const iframe = document.querySelector('iframe') if(iframe instanceof HTMLIFrameElement) console.log('hi');
tagName
const iframe = document.querySelector('iframe') if(iframe.tagName === 'IFRAME') console.log('hi');