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Run results for:
Delete vs destructure for objects without mutating
Measure the performance of delete versus removing a prop from an object without mutating
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<iframe src="https://measurethat.net/Embed?id=488536" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36
Browser:
Chrome 119
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
delete - assign
2764327.2 Ops/sec
Rest object
3142460.5 Ops/sec
delete - spread operator
3248356.8 Ops/sec
delete - JSON.stringify
1784857.6 Ops/sec
Script Preparation code:
var obj = { a:1, b:2, c:3 }
Tests:
delete - assign
const copy = Object.assign({}, obj); delete obj.a
Rest object
const { a, ...rest } = obj;
delete - spread operator
const copy = { ...obj } delete obj.a
delete - JSON.stringify
const copy = JSON.parse(JSON.stringify(obj)); delete obj.a