Run results for: overwrite new Map() vs findIndex

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

new Map()

20K/s

findIndex

19K/s

View exact numbers

Test name	Executions per second
✓ new Map()	20,130 Ops/sec
findIndex	19,277 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Tests:

new Map()
let myMap = new Map(); for (let index = 0; index < 100; index++) { const element = { _id : index, name : _.times(20, () => _.random(35).toString(36)).join('') } myMap.set(index, element); } if(myMap.has(65)) { let foundMap = myMap.get(65); foundMap.name = 'HelloMyNewName'; }
findIndex
let array = []; for (let index = 0; index < 100; index++) { const element = { _id : index, name : _.times(20, () => _.random(35).toString(36)).join('') } array.push(element); } let foundIndex = array.findIndex((array1) => array1._id); if(foundIndex !== -1) { array[foundIndex].name = 'HelloMyNewName'; }