Run results for: lodash groupBy vs Array.reduce with map

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36

Browser: Chrome 149

Operating system: Windows

Device Platform: Desktop

Date tested: 3 months ago

Benchmark engine: Benchmark.js

Lodash

364/s

Native

191/s

View exact numbers

Test name	Executions per second
✓ Lodash	364 Ops/sec
Native	191 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++) { 
	if (i%2==0) {
		data.push({ id: i.toString() });
    } else {

		data.push({ id: "i lol" });
    }
 }

Tests:

Lodash
Object.values(_.groupBy(data, "id"))
Native
var resultMap = data.reduce((acc, item) => { if (!acc.has(item.id)) { acc.set(item.id, []); } acc.get(item.id).push(item); return acc; }, new Map()) Array.from(resultMap.values())