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

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/100.0.4896.56 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 100

Operating system: iOS 15.3

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Using spread operator	324219200.0 Ops/sec
Using Array.concat	13149932.0 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)

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

Using spread operator

Using Array.concat