Run results for: lodash groupBy vs Array.reduce 100k

Run details:

User agent: Mozilla/5.0 (Linux; Android 7.1.1; SAMSUNG SM-J510FN/J510FNXXS3BTIC) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/18.0 Chrome/99.0.4844.88 Mobile Safari/537.36

Browser: Chrome Mobile 99

Operating system: Android 7.1.1

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Lodash	11.0 Ops/sec
Native	25.7 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var max2 = 100000;

var data = [];
for (var i = 0; i <= max2; i++) { data.push({ id: i }); }

Tests:

Lodash
_.groupBy(data, ({ id }) => id)
Native
data.reduce((acc, item) => { acc[item.id] = item; return acc; }, {})

Run results for: lodash groupBy vs Array.reduce 100k

Lodash

Native