Run results for: Make array of primitives unique

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36

Browser: Chrome 91

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Array.findIndex	1.8 Ops/sec
Array.indexOf	45.8 Ops/sec
Array.from(new Set(array))	244.1 Ops/sec
Object-filter	241.2 Ops/sec
Object-values	259.9 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; }, {}));

Run results for: Make array of primitives unique

Array.findIndex

Array.indexOf

Array.from(new Set(array))

Object-filter

Object-values