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Run results for:
in vs hasOwn
Object lookup performance Comparing performance of: in vs hasOwn
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<iframe src="https://measurethat.net/Embed?id=572666" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Browser:
Chrome 131
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
in
39.4M/s
hasOwn
20.5M/s
View exact numbers
Test name
Executions per second
✓
in
39,433,436 Ops/sec
hasOwn
20,501,648 Ops/sec
Script Preparation code:
var obj = { a: 1, b: 2, c: 3, d: 4, e: 5 };
Tests:
in
'd' in obj;
hasOwn
Object.hasOwn(obj, 'd');