Benchmark: v2 JavaScript spread operator vs Object.assign performance

Tests:

Using Object.assign
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = Object.assign({}, firstObject, secondObject);
using spread
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = {...firstObject, ...secondObject}

Rendered benchmark preparation results:

Previous results

Test case name	Result
Using Object.assign
using spread

ⓘ Get performance results from real users on your website with Request Metrics.

Latest run results:

Run details: (Test run date: 11 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.5 Safari/605.1.15

Browser/OS: Safari 16 on Mac OS X 10.15.7

Test name	Executions per second
Using Object.assign	2961524.0 Ops/sec
using spread	6482489.0 Ops/sec

v2 JavaScript spread operator vs Object.assign performance (version: 0)