Run results for: Immutable.Set Union vs Constructing a new plain JS Set

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser: Chrome 137

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Array.from, construct new Set

14K/s

Convert JS Set to array, construct new Set

13K/s

Immutable.Set union

5K/s

View exact numbers

Test name	Executions per second
✓ Array.from, construct new Set	13,985 Ops/sec
Convert JS Set to array, construct new Set	12,857 Ops/sec
Immutable.Set union	5,330 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/immutability-helper@2.7.0/index.min.js"></script>

Tests:

Immutable.Set union
const set1_Immutable = new Immutable.Set(Array.from(Array(100).keys())); const set2_Immutable = new Immutable.Set(Array.from(Array(1000).keys())); const result = set1_Immutable.union(set2_Immutable)
Convert JS Set to array, construct new Set
const set1_JS = new Set(Array.from(Array(100).keys())); const set2_JS = new Set(Array.from(Array(1000).keys())); const result = new Set([...set1_JS, ...set2_JS])
Array.from, construct new Set
const set1_JS = new Set(Array.from(Array(100).keys())); const set2_JS = new Set(Array.from(Array(1000).keys())); const result = new Set(Array.from(set1_JS).concat(Array.from(set2_JS)))