Run results for: Object spread operator vs property assignment

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.92 Safari/537.36

Browser: Chrome 69

Operating system: Mac OS X 10.11.5

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
Spread operator	1650551.0 Ops/sec
Property assignment	808650000.0 Ops/sec

Tests:

Spread operator
const obj = { a: 1, b: 'two', c: true }; const objExt = { ...obj, b: 2 };
Property assignment
const obj = { a: 1, b: 'two', c: true }; obj.b = 2;