Run results for: JavaScript spread operator vs Object.assign performance

Run details:

User agent: Mozilla/5.0 (iPad; CPU OS 11_3 like Mac OS X) AppleWebKit/604.1.34 (KHTML, like Gecko) CriOS/66.0.3359.122 Mobile/15E216 Safari/604.1

Browser: Chrome Mobile iOS 66

Operating system: iOS 11.3

Device Platform: iPad

Date tested: 5 years ago

Test name	Executions per second
Using the spread operator	840712.2 Ops/sec
Using Object.assign	2306748.0 Ops/sec

Tests:

Using the spread operator
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = { ...firstObject, ...secondObject };
Using Object.assign
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = Object.assign(firstObject, secondObject);