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Fastest way to check if object is empty (for in vs.
You don't need to make add for loops in your test scenarios, the benchmark does it itself.
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<iframe src="https://measurethat.net/Embed?id=577616" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Browser:
Chrome 131
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
for in
64.8M/s
object.keys()
61.9M/s
View exact numbers
Test name
Executions per second
✓
for in
64,829,908 Ops/sec
object.keys()
61,901,464 Ops/sec
Script Preparation code:
var xxx = Math.random() > 0.5 ? {foo: 'bar', hello: 'world'} : {}
Tests:
object.keys()
return Object.keys(xxx) === 0
for in
for (let key in xxx) { if (xxx.hasOwnProperty(key)) return false; } return true;