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

Run details:

User agent: Mozilla/5.0 (Linux; U; Android 11; es-us; Redmi Note 8 Pro Build/RP1A.200720.011) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.116 Mobile Safari/537.36 XiaoMi/MiuiBrowser/12.15.2-gn

Browser: Chrome Mobile 89

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
Lodash	51.8 Ops/sec
Native	150.8 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