Run results for: Perf test

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36

Browser: Chrome 74

Operating system: Mac OS X 10.14.5

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
indexOf	22.8 Ops/sec
_.uniq	2021.5 Ops/sec
Set	2498.8 Ops/sec
Custom	6.0 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Faker/3.1.0/faker.min.js"></script>

Script Preparation code:

var max1 = 5000;


var arr1 = [];
for (var i = 0; i <= max1; i++) { arr1.push(faker.internet.domainName()); }

console.log(arr1);

Tests:

indexOf
const unique = arr1.filter((i, pos) => arr1.indexOf(i) === pos);
_.uniq
const unique = _.uniq(arr1);
Set
const unique = [...new Set(arr1)];
Custom
function filterLists(arr) { const a = arr.concat(); for (let i = 0; i < a.length; i += 1) { for (let j = i + 1; j < a.length; j += 1) { if (a[i] === a[j]) { a.splice(j -= 1, 1); } } } return a; } const unique = filterLists(arr1);

indexOf

_.uniq

Set

Custom