Run results for: Set has vs object keyx

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:135.0) Gecko/20100101 Firefox/135.0

Browser: Firefox 135

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Set.has

816.6M/s

Object[key]

815.0M/s

Includes

30.6M/s

View exact numbers

Test name	Executions per second
✓ Set.has	816,612,928 Ops/sec
Object[key]	814,970,560 Ops/sec
Includes	30,638,810 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