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/101.0.4951.64 Safari/537.36 OPR/87.0.4390.25 (Edition Yx 05)

Browser: Opera 87

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Delete	2660134.0 Ops/sec
Set undefined	944407.0 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;

Run results for: Delete vs set undefined

Delete

Set undefined