Run results for: JavaScript spread operator vs object update performance

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:144.0) Gecko/20100101 Firefox/144.0

Browser: Firefox 144

Operating system: Windows

Device Platform: Desktop

Date tested: 9 months ago

Using update

486.0M/s

Using Object.assign

56.4M/s

View exact numbers

Test name	Executions per second
✓ Using update	485,996,352 Ops/sec
Using Object.assign	56,444,028 Ops/sec

Tests:

Using update
const firstObject = {} firstObject.sampleData = 'Hello world'; firstObject.moreData = 'foo bar';
Using Object.assign
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = Object.assign(firstObject, secondObject);