Benchmark: JavaScript spread operator vs Object.assign performance fork 619473

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);

Rendered benchmark preparation results:

Previous results

Test case name	Result
Using the spread operator
Using Object.assign

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:130.0) Gecko/20100101 Firefox/130.0

Browser/OS: Firefox 130 on Linux

Using Object.assign

4.2M/s

Using the spread operator

2.8M/s

View exact numbers

Test name	Executions per second
✓ Using Object.assign	4,223,932 Ops/sec
Using the spread operator	2,802,646 Ops/sec

JavaScript spread operator vs Object.assign performance fork 619473 (version: 1)