Run results for: Set has vs object keyx

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Set.has

33.0M/s

Includes

32.8M/s

Object[key]

27.6M/s

View exact numbers

Test name	Executions per second
✓ Set.has	32,953,606 Ops/sec
Includes	32,824,340 Ops/sec
Object[key]	27,631,704 Ops/sec

Script Preparation code:

var obj = (new Array(20000)).fill(null).reduce((prev, newVal) => {prev[Math.random() + ''] = Math.random() + ''; return prev; }, { sausage: 'tst' });
var array = Object.keys(obj);
var set = new Set(array);

Tests:

Includes
array.includes('sausage')
Object[key]
obj['sausage']
Set.has
set.has('sausage')

Run results for: Set has vs object keyx

performance comparison of ways to find if an array contains a value

Includes

Object[key]

Set.has