Run results for: typeof undefined vs undefined equality check vs double-equal

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; rv:109.0) Gecko/20100101 Firefox/115.0

Browser: Firefox 115

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

double-equal

5.6M/s

typeof

5.6M/s

equality

5.6M/s

View exact numbers

Script Preparation code:

window.obj = undefined

Tests: