Run results for: unshift() vs push() vs allocate-fill()

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_6_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.6 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.6.2

Device Platform: Mobile

Date tested: 11 months ago

allocate-fill

18K/s

push

4K/s

unshift

1/s

View exact numbers

Tests:

unshift
let a = []; for(var i = 0; i < 100000; ++i) { a.unshift(i); }
push
let a = []; for(var i = 0; i < 100000; ++i) { a.push(i); }
allocate-fill
var array = Array(100000); for(var i = 0; i < array.length; ++i) { array[i] = i; }