Run results for: array includes vs object[key] vs key in object

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/110.0

Browser: Firefox 110

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Includes	98021940.0 Ops/sec
Object[key]	2417126000.0 Ops/sec
key in object	2326707000.0 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:

Includes
array.includes('sausage')
Object[key]
obj['sausage']
key in object
'sausage' in obj

Run results for: array includes vs object[key] vs key in object

Performance test on array.includes, object[key] accessor and key in object check

Includes

Object[key]

key in object