Run results for: `Array.slice(0, N)` vs `Array.length = N`

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/106.0.5249.92 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 106

Operating system: iOS 16.0

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
`Array.slice(0, N)`	11814983.0 Ops/sec
`Array.length = N`	12514883.0 Ops/sec
`Object.assign([], arr)` with `Array.length = N`	795354.1 Ops/sec

Script Preparation code:

var arr = Array.from(Array(100).keys());

Tests:

`Array.slice(0, N)`
arr.slice(0, 20);
`Array.length = N`
arr.length = 20;
`Object.assign([], arr)` with `Array.length = N`
var newArr = Object.assign([], arr); newArr.length = 20;

Run results for: `Array.slice(0, N)` vs `Array.length = N`

`Array.slice(0, N)`

`Array.length = N`

`Object.assign([], arr)` with `Array.length = N`