Run results for: Delete vs set undefined

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.99 YaBrowser/19.1.1.907 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 19

Operating system: Mac OS X 10.13.4

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
Delete	2655017.0 Ops/sec
Set undefined	978761.9 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