Run results for: delete vs assign to null

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 12_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/86.0.4240.93 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 86

Operating system: iOS 12.4

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
Delete	273484.6 Ops/sec
Assign to undefined	320110.6 Ops/sec
Assign to null	400983.4 Ops/sec

Tests:

Delete
const master = { foo: 'bah', bah: 'foo', lorem: 'lorem' } const second = { ...master }; delete second.foo;
Assign to undefined
const master = { foo: 'bah', bah: 'foo', lorem: 'lorem' } const result = { ...master, foo: undefined };
Assign to null
const master = { foo: 'bah', bah: 'foo', lorem: 'lorem' } const result = { ...master, foo: null };

Run results for: delete vs assign to null

The idea's to know the time difference between using "delete obj.key" rather than obj.key = null.

Delete

Assign to undefined

Assign to null