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Run results for:
array includes vs object[key] vs key in object
Performance test on array.includes, object[key] accessor and key in object check
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<iframe src="https://measurethat.net/Embed?id=553164" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36
Browser:
Chrome 128
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Includes
24.5M/s
Object[key]
23.5M/s
key in object
22.8M/s
View exact numbers
Test name
Executions per second
✓
Includes
24,491,670 Ops/sec
Object[key]
23,534,604 Ops/sec
key in object
22,842,714 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);
Tests:
Includes
array.includes('sausage')
Object[key]
obj['sausage']
key in object
'sausage' in obj