Run results for: array includes vs object key -1

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

array.includes

25.4M/s

obj[key]

24.1M/s

View exact numbers

Test name	Executions per second
✓ array.includes	25,362,622 Ops/sec
obj[key]	24,070,768 Ops/sec

Script Preparation code:

var obj = (new Array(1000)).fill(null).reduce((prev, newVal) => {prev[Math.random() + ''] = Math.random() + ''; return prev; }, { sausage: 'tst' });
var array = Object.keys(obj);

Tests:

array.includes
array.includes('sausage')
obj[key]
!!obj['sausage']