Run results for: JavaScript spread operator vs Object.assign performance without overwriting original object

Run details:

User agent: Mozilla/5.0 (Linux; Android 12; M2102J20SG) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.5481.192 Mobile Safari/537.36 OPR/74.1.3922.71199

Browser: Opera Mobile 74

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Using the spread operator	1693637.0 Ops/sec
Using Object.assign	3662824.0 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 without overwriting original object

Using the spread operator

Using Object.assign