Run results for: slice vs splice vs concat -- mee

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

Browser: Chrome 110

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Script Preparation code:

const arr= [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]

Tests:

slice
const arr= [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20] const result = [ ...arr.slice(0, 10), 99, ...arr.slice(10), ]
loop
const arr= [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20] arr.splice(10, 0, 99);
concat
const arr= [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20] arr.concat(arr.slice(0, 10), 99, arr.slice(10))