Run results for: JavaScript spread operator vs Object.assign performance 1_2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36 Edg/136.0.0.0

Browser: Chrome 136

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Using Object.assign

38.0M/s

Using the spread operator

30.7M/s

View exact numbers

Test name	Executions per second
✓ Using Object.assign	37,955,352 Ops/sec
Using the spread operator	30,676,362 Ops/sec

Tests:

Using the spread operator
const firstObject = { sampleData: 'Hello world', moreData: Math.random() } const secondObject = { sampleData: Math.random(), moreData: 'here we go2' } const finalObject = { ...firstObject, ...secondObject };
Using Object.assign
const firstObject = { sampleData: 'Hello world', moreData: Math.random() } const secondObject = { sampleData: Math.random(), moreData: 'here we go2' } const finalObject = Object.assign(firstObject, secondObject);