Benchmark: JavaScript spread operator vs create object performance

Tests:

Using the spread operator
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = { ...firstObject, ...secondObject };
Create new object
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = { sampleData: firstObject.sampleData, moreData: secondObject.moreData };

Rendered benchmark preparation results:

Previous results

Test case name	Result
Using the spread operator
Create new object

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Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/111.0

Browser/OS: Firefox 111 on Mac OS X 10.15

Test name	Executions per second
Using the spread operator	8437144.0 Ops/sec
Create new object	1214521000.0 Ops/sec

JavaScript spread operator vs create object performance (version: 0)