Run results for: JavaScript spread operator perfornance comparisons

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36

Browser: Chrome 85

Operating system: Mac OS X 10.14.6

Device Platform: Desktop

Date tested: 3 years ago

Tests:

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