Run results for: Set has vs object keyx

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.3 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 16

Operating system: iOS 16.3.1

Device Platform: Mobile

Date tested: 2 years ago

Object[key]

10.1M/s

Set.has

9.1M/s

Includes

8.3M/s

View exact numbers

Test name	Executions per second
✓ Object[key]	10,139,940 Ops/sec
Set.has	9,097,842 Ops/sec
Includes	8,326,998 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