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Run results for:
Remove undefined attributes from an Object
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<iframe src="https://measurethat.net/Embed?id=623282" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Browser:
Chrome 143
Operating system:
Linux
Device Platform:
Desktop
Date tested:
4 months ago
Test name
Executions per second
Modified: for - delete
3453187.8 Ops/sec
New Object.fromEntries !=
5631429.0 Ops/sec
New Object.fromEntries !!
5435065.0 Ops/sec
New Object.fromEntries
5624674.5 Ops/sec
Tests:
Modified: for - delete
let obj = { a:1, b:undefined, c:undefined, d:4 } for (const key in obj) obj[key] === undefined && delete obj[key]
New Object.fromEntries !=
let obj = { a:1, b:undefined, c:undefined, d:4 } Object.fromEntries(Object.entries(obj).filter(([_, v]) => v != undefined))
New Object.fromEntries !!
let obj = { a:1, b:undefined, c:undefined, d:4 } Object.fromEntries(Object.entries(obj).filter(([_, v]) => !!v))
New Object.fromEntries
let obj = { a:1, b:undefined, c:undefined, d:4 } Object.fromEntries(Object.entries(obj).filter(([_, v]) => v))