Run results for: lodash uniq vs Map

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36

Browser: Chrome 104

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Map	3678502.2 Ops/sec
use lodash	3309628.2 Ops/sec

HTML Preparation code:


<script src='https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js'></script>

Tests:

Map
const arr = [{id: 1}, {id: 2}, {id: 3}, {id: 1}, {id: 2}, {id: 3}, {id: 1}, {id: 2}, {id: 3}]; const uniqs = []; const map = new Map(); for (const item of arr) { if (!map.has(item.id)) { map.set(item.id, item.id); uniqs.push(item); } } return uniqs;
use lodash
var l = [{id: 1}, {id: 2}, {id: 3}, {id: 1}, {id: 2}, {id: 3}, {id: 1}, {id: 2}, {id: 3}]; return _.uniq(l);