Run results for: array slice vs immutable-js takeLast 3

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:82.0) Gecko/20100101 Firefox/82.0

Browser: Firefox 82

Operating system: Mac OS X 10.14

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
array slice	19.7 Ops/sec
immutable-js	123.1 Ops/sec

HTML Preparation code:

<script src="https://unpkg.com/immutable@4.0.0-rc.12/dist/immutable.min.js"></script>

Tests:

array slice
let initArr = new Array(5000).fill(88); const limitArr = (arr, limit) => (arr.length > limit ? arr.slice(-limit) : arr); for(i=0; i<10000; i++) { initArr.push(55, 12, 3); initArr = limitArr(initArr, 5000); }
immutable-js
let initList = Immutable.List(); initList = initList.push(...(new Array(5000).fill(88))); const limitList = (list, limit) => (list.size > limit ? list.takeLast(limit) : list); for(i=0; i<10000; i++) { initList = limitList(initList.push(55, 12, 3), 5000); }