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

Run details:

User agent: Mozilla/5.0 (X11; CrOS x86_64 14150.74.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.114 Safari/537.36

Browser: Chrome 94

Operating system: Chrome OS 14150.74.0

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Using the spread operator	1567657.0 Ops/sec
Using Object.assign	3694762.0 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);