Run results for: JavaScript spread operator vs Object.assign performance reassign same variable 2

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:132.0) Gecko/20100101 Firefox/132.0

Browser: Firefox 132

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Using Object.assign

19.8M/s

Using the spread operator

10.5M/s

View exact numbers

Test name	Executions per second
✓ Using Object.assign	19,751,430 Ops/sec
Using the spread operator	10,524,940 Ops/sec

Tests:

Using the spread operator
let firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const v = {...firstObject, ...secondObject}
Using Object.assign
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const v = Object.assign({}, firstObject, secondObject);