Run results for: GroupBy vs Reduce

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.87 Safari/537.36

Browser: Chrome 80

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Lodash	52902.4 Ops/sec
Reduce	5367.2 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 data = new Array(1000).fill(null).map(() => Math.random() * 10);

Tests:

Lodash
_.groupBy(data, Math.floor);
Reduce
data.reduce((acc, value) => { const key = Math.floor(value); acc[key] ? acc[key].push(value) : (acc[key] = [ value ]); return acc; }, {})