Run results for: object spread vs immutable-js set (4.0.0-rc.12) vs native Map

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36

Browser: Chrome 107

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
object spread	747.3 Ops/sec
immutable-js	9928.0 Ops/sec
native Map	22824.3 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/4.0.0-rc.12/immutable.js" integrity="sha512-LYupkoA9jinLFKys5IYhXa5kJgKNHBQ2G1KGrf+39Vm0zxuUCWoHJ0c3FHqacUhuTUbWFU9FWFTppIqKXs9UvQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></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.set(key, {key, value}) }