Run results for: Unique Array: Lodash vs spread new Set vs reduce vs for - random data

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36

Browser: Chrome 91

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Array Unique	602.6 Ops/sec
For Loop	1220.3 Ops/sec
Array from Set	516.4 Ops/sec
Lodash Uniq	510.5 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:

function getRandomInt(max) {
    return Math.floor(Math.random() * Math.floor(max));
}

var testArr = [];
for (var i = 0; i < 100000; i++) {
    testArr.push(String(getRandomInt(1000)));
}

Tests:

Array Unique
const { resultArray } = testArr.reduce((result, item) => { if(!result.resultMap[item]){ result.resultMap[item] = true; result.resultArray.push(item) } return result; }, {resultArray: [], resultMap: {}}); return resultArray;
For Loop
const resultArray = []; const resultMap = {}; for(let item of testArr) { if(!resultMap[item]){ resultMap[item] = true; resultArray.push(item) } } return resultArray;
Array from Set
[...new Set(testArr)]
Lodash Uniq
_.uniq(testArr)

Run results for: Unique Array: Lodash vs spread new Set vs reduce vs for - random data

Array Unique

For Loop

Array from Set

Lodash Uniq