Run results for: Lodash uniqBy vs Map destructuring

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:148.0) Gecko/20100101 Firefox/148.0

Browser: Firefox 148

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 4 months ago

Lodash uniqBy

5K/s

new Map() Destructuring

2K/s

View exact numbers

Test name	Executions per second
✓ Lodash uniqBy	4,801 Ops/sec
new Map() Destructuring	2,002 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:

var myArr = Array.from({
    length: 16000
}, () => ({ someData: 123, value: Math.floor(Math.random() * 1000) }));

var myCopy = null;

Tests:

Lodash uniqBy
myCopy = _.uniqBy(myArr, 'value').map(({ value }) => value);
new Map() Destructuring
myCopy = [...new Map(myArr.map((el) => [el.value, el])).values()];