Run results for: lodash unionWith vs Set for merging without duplicates

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:140.0) Gecko/20100101 Firefox/140.0

Browser: Firefox 140

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Set

1.3M/s

unionWith

84K/s

View exact numbers

Test name	Executions per second
✓ Set	1,336,102 Ops/sec
unionWith	83,663 Ops/sec

HTML Preparation code:

<script src='https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js'></script>

Tests:

Set
const first = [ {a: 3, b: 3, c: "hey"}, {a: 3, b: 2, c: "hey"}, {a: 1, b: 2, c: "bye"}, {a: 3, b: 4, c: "hey"}, {a: 2, b: 1, c: "bye"} ]; const second = [ {a: 3, b: 4, c: "hey"}, {a: 2, b: 1, c: "bye"}, {a: 4, b: 4, c: "sup"}, {a: 3, b: 3, c: "hey"} ]; return [...new Set([...first, ...second])]
unionWith
const first = [ {a: 3, b: 3, c: "hey"}, {a: 3, b: 2, c: "hey"}, {a: 1, b: 2, c: "bye"}, {a: 3, b: 4, c: "hey"}, {a: 2, b: 1, c: "bye"} ]; const second = [ {a: 3, b: 4, c: "hey"}, {a: 2, b: 1, c: "bye"}, {a: 4, b: 4, c: "sup"}, {a: 3, b: 3, c: "hey"} ]; return _.unionWith(first, second, _.isEqual);