Run results for: Lodash _.union vs native Set() (accurate)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser: Chrome 125

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

spread to Set()

4.1M/s

spread to Set() and spread again

3.9M/s

_.union

3.4M/s

View exact numbers

Test name	Executions per second
✓ spread to Set()	4,079,332 Ops/sec
spread to Set() and spread again	3,878,396 Ops/sec
_.union	3,418,568 Ops/sec

HTML Preparation code:

<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js"></script>

Script Preparation code:

var a = [1, 2, 3, 4, 5]
var b = [3, 4, 5, 6, 7]

Tests: