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

Run details:

User agent: Mozilla/5.0 (Android 9; Mobile; rv:92.0) Gecko/92.0 Firefox/92.0

Browser: Firefox Mobile 92

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
Using the spread operator	3587125.5 Ops/sec
Using Object.assign	6939157.5 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);