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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Goanna/6.8 PaleMoon/34.0.1

Browser: Pale Moon (Firefox Variant) 34

Operating system: Linux

Device Platform: Desktop

Date tested: 4 months ago

Using Object.assign

3.6M/s

Using the spread operator

764K/s

View exact numbers

Test name	Executions per second
✓ Using Object.assign	3,578,464 Ops/sec
Using the spread operator	763,575 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);