Run results for: Set has vs object key

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_0_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.0.1

Device Platform: Mobile

Date tested: 2 years ago

Object[key]

13.7M/s

Set.has

13.5M/s

Includes

10.0M/s

View exact numbers

Test name	Executions per second
✓ Object[key]	13,665,333 Ops/sec
Set.has	13,501,607 Ops/sec
Includes	9,973,539 Ops/sec

Script Preparation code:

var obj = (new Array(1000)).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('saudage')

Run results for: Set has vs object key

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

Includes

Object[key]

Set.has