Run results for: Object.keys(object).includes(key) vs key in object

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36

Browser: Chrome 95

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Object.keys(object).includes(key)	13429.3 Ops/sec
key in object	4772072.5 Ops/sec

Script Preparation code:

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

Tests: