Run results for: typeof undefined vs === undefined

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.71 Safari/537.36

Browser: Chrome 94

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
typeof t === "undefined"	85999.6 Ops/sec
t === undefined	87688.1 Ops/sec

Script Preparation code:

var t = "not undefined";

AخA
 
var t = "not undefined";

Tests:

typeof t === "undefined"
console.log(typeof t === 'undefined')
console.log(typeof t === 'undefined')
t === undefined
console.log(t === undefined)
console.log(t === undefined)