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Run results for:
for-in vs object.keys vs object.values for objects perf
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<iframe src="https://measurethat.net/Embed?id=626858" 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/26.3 Safari/605.1.15
Browser:
Safari 26
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one month ago
Test name
Executions per second
for-in
1948718.6 Ops/sec
Object.keys
1746466.9 Ops/sec
Object.values
1702555.5 Ops/sec
Script Preparation code:
var obj =[...new Array(1)].map(x=>({id:x,name:x}));
Tests:
for-in
for (var key in obj) { console.log(obj[key].id); }
Object.keys
Object.keys(obj).forEach(key => console.log(obj[key].id));
Object.values
Object.values(obj).forEach(n => console.log(n.id));