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Run results for:
Object.entries vs Object.keys vs for...in
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=615697" 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/139.0.0.0 Safari/537.36 Edg/139.0.0.0
Browser:
Chrome 139
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
for...in
2K/s
Object.entries
2K/s
Object.keys
2K/s
View exact numbers
Test name
Executions per second
✓
for...in
2,469 Ops/sec
Object.entries
2,113 Ops/sec
Object.keys
2,110 Ops/sec
Script Preparation code:
var obj = {}; for (let i = 0; i < 100; i++) { obj[`k_${i}`] = i; }
Tests:
Object.entries
for (const [k, v] of Object.entries(obj)) console.log(k, v);
Object.keys
for (const k of Object.keys(obj)) console.log(k, obj[k]);
for...in
for (const k in obj) console.log(k, obj[k]);