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Run results for:
delete vs null vs undefined vs void 0 vs Object.create(null) propertie
delete vs null vs undefined vs void 0 vs Object.create(null)
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<iframe src="https://measurethat.net/Embed?id=576481" 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/131.0.0.0 Safari/537.36
Browser:
Chrome 131
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
null
3.0M/s
undefined
943K/s
delete
12K/s
View exact numbers
Test name
Executions per second
✓
null
2,971,609 Ops/sec
undefined
942,906 Ops/sec
delete
12,408 Ops/sec
Tests:
null
for(let i = 0; i < 1000;i++) { let a = { a: 999, b: 3000 } a.a = null; a.b = null; }
undefined
for(var i = 0; i < 1000;i++) { let a = { a: 999, b: 3000 } a.a = undefined; a.b = undefined; }
delete
for(var i = 0; i < 1000;i++) { let a = { a: 999, b: 3000 } delete a.a; delete a.b; }