Run results for: Lodash difference vs Set & Filter Larger and Random

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.64 Safari/537.36

Browser: Chrome 101

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Lodash	27.1 Ops/sec
Set & Filter	31.6 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 arr1 = [];
for (let i = 0; i < 100000; i++) {
    arr1.push('' + Math.random());
}

var arr2 = [];
for (let i = 0; i < 100000; i++) {
    arr2.push('' + Math.random());
}

Tests:

Lodash
const notInArr1 = _.difference(arr2, arr1) const notInArr2 = _.difference(arr1, arr2)
Set & Filter
const arr1Set = new Set(); const arr2Set = new Set(); arr1.forEach(value => arr1Set.add(value)); arr2.forEach(value => arr2Set.add(value)); const notInArr1 = arr2.filter(value => !arr1Set.has(value)); const notInArr2 = arr1.filter(value => !arr2Set.has(value));