Run results for: JavaScript spread operator vs Object.assign()

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_0_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36

Browser: Chrome 87

Operating system: Mac OS X 11.0.1

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Spread	1889945.1 Ops/sec
Assign	4543269.5 Ops/sec

Tests:

Spread
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = { ...firstObject, ...secondObject };
Assign
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = Object.assign({}, firstObject, secondObject);