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/129.0.0.0 Safari/537.36

Browser: Chrome 129

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

20.7M/s

Object.prototype.hasOwnProperty

19.2M/s

Object.hasOwn

7.6M/s

View exact numbers

Test name	Executions per second
✓ in	20,736,342 Ops/sec
Object.prototype.hasOwnProperty	19,212,296 Ops/sec
Object.hasOwn	7,590,246 Ops/sec

Script Preparation code:

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

Tests: