Run results for: Lodash vs Native Date string comparison

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36

Browser: Chrome 108

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Date Object without lodash	285847.7 Ops/sec
String Parse with lodash	986909.7 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Tests:

Date Object without lodash
const articles = ["10-2-2021", "9-3-2022", "2-4-2021"]; const byYear = {}; articles.forEach(el => { const year = new Date(el).getFullYear(); const objYear = byYear[year]; byYear[year] = Array.isArray(objYear) ? [...objYear, el] : [el]; });
String Parse with lodash
const articles = ["10-2-2021", "9-3-2022", "2-4-2021"]; const articleYear = (posted_date) => posted_date.split("-").pop(); const articlesByYear = _.groupBy(articles, articleYear);