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

Run details:

User agent: Mozilla/5.0 (Linux; Android 8.0.0; MI 6 Build/OPR1.170623.027) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.156 Mobile Safari/537.36

Browser: Chrome Mobile 64

Operating system: Android 8.0.0

Device Platform: Mobile

Date tested: 5 years ago

Test name	Executions per second
Using the spread operator	1107436.0 Ops/sec
Using Object.assign	717637.9 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);

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

Using the spread operator

Using Object.assign