Run results for: object spread vs immutable-js set vs native Map copy

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/115.0.5790.160 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 115

Operating system: iOS 16.6

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
object spread	6641.8 Ops/sec
immutable-js	31659.8 Ops/sec
native Map	7607.0 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:

object spread
let obj = {}; for(i=0;i<100;i++){ const key = 'key'+i const value = 'value'+i obj = {...obj, [key]: {key, value}} }
immutable-js
let obj = Immutable.Map(); for(i=0;i<100;i++){ const key = 'key'+i const value = 'value'+i obj = obj.set(key, {key, value}) }
native Map
let obj = new Map(); for(i=0;i<100;i++){ const key = 'key'+i const value = 'value'+i obj = new Map(obj); obj.set(key, {key, value}) }