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

Run details:

User agent: Mozilla/5.0 (Linux; Android 8.1.0; CLT-L29) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.96 Mobile Safari/537.36

Browser: Chrome Mobile 72

Operating system: Android 8.1.0

Device Platform: Mobile

Date tested: 5 years ago

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);
Manual assignment
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = {}; finalObject.sampleData = firstObject.sampleData; secondObject.moreData = secondObject.moreData;