Run results for: js array copy speed comparison

Run details:

User agent: Mozilla/5.0 (Linux; arm_64; Android 12; M2007J20CG) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.124 YaBrowser/22.9.6.73.00 SA/3 Mobile Safari/537.36

Browser: Yandex Browser 22

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
map	26768360.0 Ops/sec
array.from	2706302.0 Ops/sec
for loop	19491780.0 Ops/sec
foreach	12750940.0 Ops/sec
slice	56607340.0 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