Run results for: typeof vs cached typeof

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:145.0) Gecko/20100101 Firefox/145.0

Browser: Firefox 145

Operating system: Windows

Device Platform: Desktop

Date tested: 8 months ago

uncached typeof

665K/s

cached typeof

470K/s

View exact numbers

Test name	Executions per second
✓ uncached typeof	664,508 Ops/sec
cached typeof	470,384 Ops/sec

Script Preparation code:

var arr = [null,true,123,'',{},[]];

Tests:

uncached typeof
for(let n = 0; n < 100; n++) { arr.map((i) => { if (typeof i !== 'XXX') { return typeof i; } }); }
cached typeof
for(let n = 0; n < 100; n++) { arr.map((i) => { const typeOfI = typeof i; if (typeOfI !== 'XXX') { return typeOfI; } }); }