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Run results for:
`Array.slice(0, N)` vs `Array.length = N`
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Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36
Browser:
Chrome 115
Operating system:
Linux
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
`Array.slice(0, N)`
11259174.0 Ops/sec
`Array.length = N`
10930958.0 Ops/sec
`Object.assign([], arr)` with `Array.length = N`
292312.2 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;