Run results for: Typeof Window Check

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36 Edg/98.0.1108.56

Browser: Chrome 98

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Memoize typeof call	89052.7 Ops/sec
Call typeof every time	320.1 Ops/sec

Tests:

Memoize typeof call
let cachedGlobal; function getGlobal() { if (cachedGlobal) { return cachedGlobal; } if (typeof window !== 'undefined' && window) { cachedGlobal = window; } return cachedGlobal } for (let i = 0; i < 4000; i++) { const global = getGlobal(); }
Call typeof every time
function getGlobal() { if (typeof window !== 'undefined' && window) { return window; } } for (let i = 0; i < 4000; i++) { const global = getGlobal(); }