Run results for: JavaScript spread operator vs Object.assign performance v3455676854743

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36 OPR/101.0.0.0

Browser: Opera 101

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Using the spread operator	1064076.9 Ops/sec
Using Object.assign	8564312.0 Ops/sec

Tests:

Using the spread operator

let firstObject = { sampleData: 'Hello world' }
const secondObject = { moreData: 'foo bar', a: 1, b: 2, c: false, d: 'hello' }
firstObject = {
	...firstObject,
  	...secondObject
};

AخA
 
let firstObject = { sampleData: 'Hello world' }const secondObject = { moreData: 'foo bar', a: 1, b: 2, c: false, d: 'hello' }firstObject = {    ...firstObject,    ...secondObject};

Using Object.assign

const firstObject = { sampleData: 'Hello world' }
const secondObject = { moreData: 'foo bar', a: 1, b: 2, c: false, d: 'hello' }
Object.assign(firstObject, secondObject);

 
const firstObject = { sampleData: 'Hello world' }const secondObject = { moreData: 'foo bar', a: 1, b: 2, c: false, d: 'hello' }Object.assign(firstObject, secondObject);