Run results for: lodash intersection test vs Set/Map

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 OPR/106.0.0.0

Browser: Opera 106

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Map/Set

316K/s

Lodash

83K/s

View exact numbers

Test name	Executions per second
✓ Map/Set	315,687 Ops/sec
Lodash	82,784 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js"></script>

Script Preparation code:

var arr1 = [];
for (var i = 0; i <= 100; i++) { arr1.push({
	id: i,
  text: 'blabla-' + i
}); }

var arr2 = [];
for (var i = 0; i <= 150; i+=2) { arr2.push({
	id: i,
  text: 'blabla-' + i
}); }

Tests:

Lodash
_.intersectionWith(arr1, arr2, (a,b) => a.id == b.id);
Map/Set
const s = new Set(arr2); arr1.filter(a => s.has(a));