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Run results for:
delete vs null vs undefined vs void 0 vs Object.create(null) v2
delete vs null vs undefined vs void 0 vs Object.create(null)
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<iframe src="https://measurethat.net/Embed?id=540393" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Whale/3.5.3.2 Safari/537.36
Browser:
Chrome 120
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
delete
2.0M/s
void 0
2.0M/s
null
1.9M/s
undefined
6K/s
Object.create(null)
5K/s
View exact numbers
Test name
Executions per second
✓
delete
1,959,101 Ops/sec
void 0
1,957,974 Ops/sec
null
1,909,970 Ops/sec
undefined
6,390 Ops/sec
Object.create(null)
5,487 Ops/sec
Tests:
null
var a = 999; for(var i = 0; i < 1000;i++) { a = null; }
undefined
var a = 999; for(var i = 0; i < 1000;i++) { a = undefined; }
Object.create(null)
var a = 999; for(var i = 0; i < 1000;i++) { a = Object.create(null); }
void 0
var a = 999; for(var i = 0; i < 1000;i++) { a = void 0; }
delete
var a = 999; for(var i = 0; i < 1000;i++) { delete a; }