Run results for: lodash groupBy vs Array.reduce vs Ramda on million items

Run details:

User agent: Mozilla/5.0 (Android 15; Mobile; rv:136.0) Gecko/136.0 Firefox/136.0

Browser: Firefox Mobile 136

Operating system: Android

Device Platform: Mobile

Date tested: 2 months ago

Test name	Executions per second
Lodash	22.0 Ops/sec
Native	47.2 Ops/sec
Ramda	20440142.0 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/ramda/0.27.1/ramda.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js'></script>

Script Preparation code:

var max2 = 1000000;

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; }, {})
Ramda
R.groupBy(data => data.id)

Run results for: lodash groupBy vs Array.reduce vs Ramda on million items

Lodash

Native

Ramda