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

Test name	Executions per second
`Array.slice(0, N)`	14201890.0 Ops/sec
`Array.length = N`	10926810.0 Ops/sec
`Object.assign([], arr)` with `Array.length = N`	283612.8 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;