Run results for: JavaScript reduce vs Object.assign performance

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Using Object.assign

24.9M/s

Using reduce

17.0M/s

View exact numbers

Test name	Executions per second
✓ Using Object.assign	24,893,022 Ops/sec
Using reduce	16,992,730 Ops/sec

Tests:

Using reduce
const firstObject = { '...': true } const arrayOfObjects = [{ moreData: 'foo bar' }, { evenMore: 'data' }] const finalObject = arrayOfObjects.reduce((result, object) => ({ ...result, ...object }), { '...': true })
Using Object.assign
const firstObject = { '...': true } const arrayOfObjects = [{ moreData: 'foo bar' }, { evenMore: 'data' }] const finalObject = Object.assign(firstObject, ...arrayOfObjects);