Run results for: lodash groupBy vs Array.reduce 100k better 2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:132.0) Gecko/20100101 Firefox/132.0

Browser: Firefox 132

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Lodash

414/s

Native

265/s

View exact numbers

Test name	Executions per second
✓ Lodash	414 Ops/sec
Native	265 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) => { const groupValue = (item['id'] ?? '').toString(); const results = acc[groupValue] ?? []; results.push(item); acc[groupValue] = results; return acc; }, {})