Run results for: Make array of primitives unique

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:126.0) Gecko/20100101 Firefox/126.0

Browser: Firefox 126

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Object-values

11K/s

Object-filter

10K/s

Array.from(new Set(array))

4K/s

Array.indexOf

118/s

Array.findIndex

80/s

View exact numbers

Test name	Executions per second
✓ Object-values	10,601 Ops/sec
Object-filter	9,753 Ops/sec
Array.from(new Set(array))	4,068 Ops/sec
Array.indexOf	118 Ops/sec
Array.findIndex	80 Ops/sec

Script Preparation code:

function getRandomInt(max) {
  return Math.floor(Math.random() * max);
}

var arr = [];
for(let i = 0; i < 10000; i++) {
	  arr.push(getRandomInt(1000));
}

Tests:

Array.findIndex
const compare = (a,b) => a === b; arr.filter((item, idx) => arr.findIndex(compare) === idx);
Array.indexOf
arr.filter((item, idx) => arr.indexOf(item) === idx);
Array.from(new Set(array))
Array.from(new Set(arr));
Object-filter
const obj = {}; arr.filter((item) => { if(!obj[item]){ obj[item] = true; return true; } return false; });
Object-values
Object.values(arr.reduce((acc, item) => { if(!acc[item]){ acc[item] = item; } return acc; }, {}));