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Run results for:
objects delete vs null vs undefined vs void 0 vs Object.create(null)
delete vs null vs undefined vs void 0 vs Object.create(null)
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<iframe src="https://measurethat.net/Embed?id=605363" 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/136.0.0.0 Safari/537.36
Browser:
Chrome 136
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
null
5.0M/s
void 0
5.0M/s
undefined
1.7M/s
Object.create(null)
151K/s
delete
15K/s
View exact numbers
Test name
Executions per second
✓
null
5,007,848 Ops/sec
void 0
4,965,373 Ops/sec
undefined
1,674,188 Ops/sec
Object.create(null)
150,887 Ops/sec
delete
14,620 Ops/sec
Tests:
null
var a = 999; for(var i = 0; i < 1000;i++) { const b = {a:null}; }
undefined
var a = 999; for(var i = 0; i < 1000;i++) { const b = {a: undefined}; }
Object.create(null)
var a = 999; for(var i = 0; i < 1000;i++) { const b = {a: Object.create(null)}; }
void 0
var a = 999; for(var i = 0; i < 1000;i++) { const b = {a: void 0}; }
delete
var a = 999; for(var i = 0; i < 1000;i++) { const b = {a: void 0}; delete b.a; }