Run results for: JavaScript spread operator vs Array.concat performance

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:99.0) Gecko/20100101 Firefox/99.0

Browser: Firefox 99

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Using spread operator	5581798.5 Ops/sec
Using Array.concat	6368478.5 Ops/sec

Tests:

Using spread operator
const array1 = [1, 2, 3, 4, 5] const array2 = [6, 7, 8, 9, 10] const finalArray = [ ...array1, ...array2 ]
Using Array.concat
const array1 = [1, 2, 3, 4, 5] const array2 = [6, 7, 8, 9, 10] const finalArray = array1.concat(array2)