Run results for: Set.prototype.has vs Object.hasOwn

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:136.0) Gecko/20100101 Firefox/136.0

Browser: Firefox 136

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

Set.prototype.has

3K/s

Object.hasOwn

2K/s

View exact numbers

Test name	Executions per second
✓ Set.prototype.has	2,539 Ops/sec
Object.hasOwn	2,394 Ops/sec

Script Preparation code:

window.myObject = {};
window.mySet = new Set();
for (let i = 1; i < 1001; i++) {
  window.myObject[i] = null;
  window.mySet.add(i);
}

Tests:

Object.hasOwn
for (let i = 1000; i > 0; i--) { Object.hasOwn(window.myObject, i); }
Set.prototype.has
for (let i = 1000; i > 0; i--) { window.mySet.has(i); }