Run results for: Lodash Map&Uniq vs Javascript dictionary

Run details:

User agent: Mozilla/5.0 (X11; Fedora; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.36

Browser: Chrome 90

Operating system: Fedora

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Lodash Uniq	5176.8 Ops/sec
Javascript Set	744.6 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.5/lodash.min.js"></script>

Script Preparation code:

var array = [];

for (var i=0; i<=10000; i++) {
   array.push({ name: 'Mr.' + i, age: i % 100 })
}

Tests:

Lodash Uniq
_.uniq(_.map(array, a => a.age))
Javascript Set
var unique = []; var distinct = []; for( let i = 0; i < array.length; i++ ){ if( !unique[array[i].age]){ distinct.push(array[i].age); unique[array[i].age] = 1; } }