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Run results for:
for-in vs object.keys vs object.values for objects perf 5
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<iframe src="https://measurethat.net/Embed?id=520186" 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/116.0.5845.713 YaBrowser/23.9.5.713 (corp) Yowser/2.5 Safari/537.36
Browser:
Yandex Browser 23
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
for-in
31.1 Ops/sec
Object.keys
34.3 Ops/sec
Object.values
34.2 Ops/sec
Script Preparation code:
var obj =[...new Array(10000)].reduce((o,_,i)=>{ o[i+'-id']={id:i}; return o; },{});
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));