Run results for: Array includes vs Object key lookup vs Object hasOwnProperty

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser: Chrome 114

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Array includes	15257631.0 Ops/sec
Object key lookup	14990970.0 Ops/sec
Object hasOwnProperty	13562302.0 Ops/sec

Script Preparation code:

var a = ['one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten'];
var b = Object.freeze({
    'one': true,
    'two': true,
    'three': true,
    'four': true,
    'five': true,
    'six': true,
    'seven': true,
    'eight': true,
    'nine': true,
    'ten': true
});

Tests:

Array includes
return a.includes('eight')
Object key lookup
return b['eight'] === true
Object hasOwnProperty
return b.hasOwnProperty('eight')

Run results for: Array includes vs Object key lookup vs Object hasOwnProperty

Compares performance of Array.prototype.includes() vs Object key lookup vs Object.prototype.hasOwnProperty()

Array includes

Object key lookup

Object hasOwnProperty