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

Run details:

User agent: Mozilla/5.0 (Linux; Android 12; SM-G986U1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.74 Mobile Safari/537.36 EdgA/99.0.1150.55

Browser: Chrome Mobile 99

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Using the spread operator	1729116.0 Ops/sec
Using Object.assign	4609984.0 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