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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser: Chrome 114

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Immutable.Set union	3312.1 Ops/sec
Convert JS Set to array, construct new Set	7443.6 Ops/sec
Array.from, construct new Set	7721.8 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)))

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

Immutable.Set union

Convert JS Set to array, construct new Set

Array.from, construct new Set