Run results for: in vs Object.hasOwn vs Object.prototype.hasOwnProperty

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser: Chrome 138

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

95.2M/s

Object.prototype.hasOwnProperty

53.3M/s

Object.hasOwn

49.0M/s

View exact numbers

Test name	Executions per second
✓ in	95,197,144 Ops/sec
Object.prototype.hasOwnProperty	53,286,856 Ops/sec
Object.hasOwn	48,965,920 Ops/sec

Script Preparation code:

var obj = { a: 1, b: 2, c: 3, d: 4, e: 5 };

Tests: