Run results for: Spread vs Object.assign vs Object.keys vs update

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Tests:

Using the spread operator
const firstObject = { sampleData: 'Hello world',sampleData2: 'Hello world',sampleData3: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = { ...firstObject, ...secondObject };
Using Object.assign
const firstObject = { sampleData: 'Hello world',sampleData2: 'Hello world',sampleData3: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = Object.assign(firstObject, secondObject);
Not merging
const firstObject = { sampleData: 'Hello world',sampleData2: 'Hello world',sampleData3: 'Hello world' } const secondObject = { moreData: 'foo bar' } Object.keys(firstObject).map(key => {firstObject[key] = firstObject[key] })
Update
const firstObject = { sampleData: 'Hello world',sampleData2: 'Hello world',sampleData3: 'Hello world' } const secondObject = { moreData: 'foo bar' } firstObject["moreData"] = 'foo bar'