Run results for: Delete vs set undefined

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.6998.35/36 Safari/537.36

Browser: Chrome 134

Operating system: Windows

Device Platform: Desktop

Date tested: 9 months ago

Set undefined

443.8M/s

Delete

27.9M/s

View exact numbers

Test name	Executions per second
✓ Set undefined	443,836,448 Ops/sec
Delete	27,930,064 Ops/sec

Script Preparation code:

var obj = {a:1, b:2, c:3, d:4};

Tests:

Delete
delete obj.a; delete obj.b; delete obj.c; delete obj.d;
Set undefined
obj.a = undefined; obj.b = undefined; obj.c = undefined; obj.d = undefined;