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Run results for:
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=589429" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3 Safari/605.1.15
Browser:
Safari 18
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
object.keys()
619.2M/s
for in
225.7M/s
View exact numbers
Test name
Executions per second
✓
object.keys()
619,180,352 Ops/sec
for in
225,707,760 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;