Run results for: lodash vs plain vanilla countBy on object iter

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36

Browser: Chrome 107

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
vanilla js foreach Iter using set	3175.2 Ops/sec
lodash countBy	3639.0 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 products = {
                product1 : {Category: 'category1', Brand: 'brand1'},
                product2 : {Category: 'category1', Brand: 'brand2'},
                product3 : {Category: 'category2', Brand: 'brand3'},
                product4 : {Category: 'category2', Brand: 'brand3'}
         }
for(var i=5; i<95; i++) {
    products['product'+i] = {Category: 'category3', Brand: 'brand'+i}
}
var uniqueCategoriesPresentAcrossProducts = new Set();
var level = 'Category';
var count = 0;

Tests:

vanilla js foreach Iter using set
_.countBy(products, level); Object.keys(products).length
lodash countBy
Object.keys(products).forEach(product => uniqueCategoriesPresentAcrossProducts.has(products[product][level]) ? null : uniqueCategoriesPresentAcrossProducts.add(products[product][level]) );

Run results for: lodash vs plain vanilla countBy on object iter

vanilla js foreach Iter using set

lodash countBy