Run results for: JavaScript spread operator vs Object.assign performance vs Adding to object one (size 5)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Tests:

Using the spread operator
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData1: 'foo bar', moreData2: 'foo bar', moreData3: 'foo bar', moreData4: 'foo bar', moreData5: 'foo bar' } const finalObject = { ...firstObject, ...secondObject };
Using Object.assign
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData1: 'foo bar', moreData2: 'foo bar', moreData3: 'foo bar', moreData4: 'foo bar', moreData5: 'foo bar' } const finalObject = Object.assign(firstObject, secondObject);
Add to first
const firstObject = { sampleData: 'Hello world' } firstObject.moreData1 = 'foo bar' firstObject.moreData2 = 'foo bar' firstObject.moreData3 = 'foo bar' firstObject.moreData4 = 'foo bar' firstObject.moreData5 = 'foo bar'