Run results for: Set has vs prop in object

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36 OPR/107.0.0.0

Browser: Opera 107

Operating system: Windows

Device Platform: Desktop

Date tested: 2 months ago

Test name	Executions per second
Includes	18593830.0 Ops/sec
Object[key]	16118300.0 Ops/sec
Set.has	18496590.0 Ops/sec
Object.hasOwnProperty	13202900.0 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]
'sausage' in obj
Set.has
set.has('saudage')
Object.hasOwnProperty
obj.hasOwnProperty('sausage')

Run results for: Set has vs prop in object

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

Includes

Object[key]

Set.has

Object.hasOwnProperty