Run results for: js array copy speed comparison

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/110.0.5481.83 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 110

Operating system: iOS 15.5

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
map	19852140.0 Ops/sec
array.from	9440199.0 Ops/sec
for loop	50733890.0 Ops/sec
foreach	19787300.0 Ops/sec
slice	79082730.0 Ops/sec

Tests:

map
const arr = [1,2,3,4,5] const newArr = arr.map(e=>e)
array.from
const arr = [1,2,3,4,5] const newArr = Array.from(arr)
for loop
const arr = [1,2,3,4,5] let newArr = []; for(let i = 0; i < arr.length; i++) { newArr[i] = arr[i]; }
foreach
const arr = [1,2,3,4,5] let newArr = [] arr.forEach(e => { newArr.push(e) })
slice
const arr = [1,2,3,4,5] const newArr = arr.slice()

Run results for: js array copy speed comparison

map

array.from

for loop

foreach

slice