Run results for: 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/152.0.0.0 Safari/537.36

Browser: Chrome 152

Operating system: Windows

Device Platform: Desktop

Date tested: 24 days ago

Object.prototype.hasOwnProperty

6/s

Object.hasOwn

5/s

View exact numbers

Test name	Executions per second
✓ Object.prototype.hasOwnProperty	6 Ops/sec
Object.hasOwn	5 Ops/sec

Script Preparation code:

window.myObject = {};
window.mySet = new Set();
for (let i = 1; i < 10_000_000; i++) {
  window.myObject[i] = null;
  window.mySet.add(i);
}

Tests:

Object.hasOwn
for (let i = 10_000_000; i > 0; i--) { Object.hasOwn(window.myObject, i); }
Object.prototype.hasOwnProperty
for (let i = 10_000_000; i > 0; i--) { window.myObject.hasOwnProperty(i); }