Run results for: Remove duplicate objects by a property

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:133.0) Gecko/20100101 Firefox/133.0

Browser: Firefox 133

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Lodash

860/s

Filter and IndexOf

397/s

Filter and FindIndex

368/s

View exact numbers

Test name	Executions per second
✓ Lodash	860 Ops/sec
Filter and IndexOf	397 Ops/sec
Filter and FindIndex	368 Ops/sec

HTML Preparation code:

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

Script Preparation code:

const DATA = {}

for (let keyIndex = 1; keyIndex <= 10; keyIndex++) {
    const key = `key${keyIndex}`; // Dynamically generate key names
    const objectsArray = [];

    for (let n = 1; n <= 10000; n++) {
      objectsArray.push({ id: n % 35 }); // Push objects with id: n % 35
    }

    DATA[key] = objectsArray; // Assign the array to the key
  }

Tests:

Filter and FindIndex
const groupedWithoutDuplicates = {} Object.keys(DATA).forEach((key) => { groupedWithoutDuplicates[key] = DATA[key].filter( (item, index, self) => index === self.findIndex((t) => t.id === item.id) ) })
Filter and IndexOf
const groupedWithoutDuplicates = {} Object.entries(DATA).forEach(([key, value]) => { const ids = value.map((item) => item.id) groupedWithoutDuplicates[key] = value.filter((item, index) => index === ids.indexOf(item.id)) })
Lodash
const groupedWithoutDuplicates = {} Object.entries(DATA).forEach(([key, value]) => { groupedWithoutDuplicates[key] = _.uniqBy(value, 'id') })