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

Run details:

User agent: Mozilla/5.0 (Android 12; Mobile; rv:109.0) Gecko/114.0 Firefox/114.0

Browser: Firefox Mobile 114

Operating system: Android

Device Platform: Mobile

Date tested: 10 months ago

Test name	Executions per second
Using the spread operator	6927064.0 Ops/sec
Using Object.assign	12301270.0 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);