Run results for: Set vs Filter vs Reduce for unique

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:137.0) Gecko/20100101 Firefox/137.0

Browser: Firefox 137

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Array from set

1.3M/s

Set spread

1.2M/s

Reduce

986K/s

Filter

760K/s

View exact numbers

Script Preparation code:

var array = Array.from({length: 40}, () => Math.floor(Math.random() * 140));

Tests:

Set spread
const f = [... new Set(array)]
Array from set
const s = new Set(array) const l = Array.from(s)
Filter
const b = array.filter((i,index) => array.indexOf(i)=== index)
Reduce
const r = array.reduce((previous, current) => { if(!previous.includes(current)) { previous.push(current); } return previous; }, []);