Benchmark: Big array: Lodash vs. Set Intersection vs Loop with Set

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 = new Array(1000).fill().map((_,a) => a);
var second = first.slice(900);

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)
Loop with Set
const firstSet = new Set(first); second.filter(item => firstSet.has(item));

Rendered benchmark preparation results:

Previous results

Test case name	Result
Javascript Set intersection
Lodash intersection
Loop with Set

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser/OS: Chrome 135 on Mac OS X 10.15.7

Loop with Set

111K/s

Javascript Set intersection

65K/s

Lodash intersection

24K/s

View exact numbers

Test name	Executions per second
✓ Loop with Set	111,217 Ops/sec
Javascript Set intersection	65,012 Ops/sec
Lodash intersection	24,291 Ops/sec

Big array: Lodash vs. Set Intersection vs Loop with Set (version: 1)