Run results for: Array Intersection vs. Set Intersection vs. Lodash vs Sets

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36

Browser: Chrome 107

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Javascript Set intersection	201123.2 Ops/sec
Lodash intersection	390625.8 Ops/sec
Javascript Array intersection	110109.0 Ops/sec
set2	270822.9 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 first = [...Array(100)].map(it => ~~(Math.random() * 1000));
var second = [...Array(20)].map(it => ~~(Math.random() * 1000));

Tests:

Javascript Set intersection
const firstSet = new Set(first); const secondSet = new Set(second); new Set([...firstSet].filter(item => secondSet.has(item)));
Lodash intersection
_.intersection(first, second)
Javascript Array intersection
first.filter(it => second.includes(it))
set2
const setA = new Set(first); const setB = new Set(second); const _intersection = new Set() for (const elem of setB) { if (setA.has(elem)) { _intersection.add(elem) } }