Run results for: Lodash uniq vs Object unique keys vs Set

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

Lodash uniq

8.8M/s

Set

6.2M/s

Object unique key

3.7M/s

View exact numbers

Test name	Executions per second
✓ Lodash uniq	8,817,049 Ops/sec
Set	6,205,658 Ops/sec
Object unique key	3,710,283 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 arr = ['Jane', 'Bob', 'Kat', 'Kat', 'Bob', 'Jane', 'Ian', 'Jane', 'Bob', 'Kat', 'Kat', 'Bob', 'Jane', 'Ian'];

Array.prototype.uniqueString = function() {
    let tmpObj = {}
    for (var i = 0; i < this.length; i++) {
        tmpObj[this[i]] = this[i]
    }
    return Object.values(tmpObj)
}

Tests:

Lodash uniq
_.uniq(arr);
Object unique key
arr.uniqueString();
Set
new Set(arr)