Lodash is a very popular JavaScript library and I have come across it in almost every project I have, but was it justified? is it that good? let's find out in this article. What is Lodash? It’s a modern JavaScript utility library delivering modularity, performance & extras. This is what you will see when you open the . official Lodash documentation I think many of you have already either heard or worked with it, so let's get straight to the point. Note in this article I am using: Lodash - v4.17.21 Node - v16.13.2 I created a test data array of 100 objects. If I paste this array here, it will take up half a page, so I will hide all elements in the array, but be aware that I am using 100 elements in my tests. By the way, you can find all test data on my GitHub by following this link. I want to simulate how a filter method works in JavaScript and Lodash. Test 1: JavaScript filter() Lodash filter() Lodash filter performance test import lodash from 'lodash';

const data = [...]; // 100 objects

console.time('lodash-filter');

lodash.filter(data, ({ isMarried }) => isMarried);

console.timeEnd('lodash-filter'); 0.146ms Lodash filter operation execution time: [Running] node "/personal/lodash_vs_js/lodash-filter.js"
lodash-filter: 0.146ms

[Done] exited with code=0 in 0.091 seconds JavaScript native filter method performance test const data = [...]; // 100 objects

console.time('js-filter');

data.filter(({ isMarried }) => isMarried);

console.timeEnd('js-filter'); 0.098ms JavaScript filter operation execution time: [Running] node "/personal/lodash_vs_js/js-filter.js"
js-filter: 0.098ms

[Done] exited with code=0 in 0.059 seconds So as you can see javaScript native filter method is almost on 50% faster than Lodash filter method. In this test, I want to compare the performance of the map method in JavaScript and Lodash. Test 2: JavaScript map() Lodash map() Lodash map method performance test import lodash from 'lodash'; 

const data = [...]; // 100 objects

console.time('lodash-map');

lodash.map(data, (item) => {
    if (item.isMarried) {
        item.isHappy = true;
    }

    return item;
});

console.timeEnd('lodash-map'); 0.269ms Lodash map operation execution time: [Running] node "/personal/lodash_vs_js/lodash-map.js"
lodash-map: 0.269ms

[Done] exited with code=0 in 0.09 seconds JavaScript native map method performance test const data = [...]; // 100 objects

console.time('js-map');

data.map((item) => {
    if (item.isMarried) {
        item.isHappy = true;
    }

    return item;
});

console.timeEnd('js-map'); 0.105ms JavaScript map operation execution time: [Running] node "/personal/lodash_vs_js/js-map.js"
js-map: 0.105ms

[Done] exited with code=0 in 0.058 seconds So in the second test JavaScript native map is more than on 100% faster than Lodash map method. In this test, I want to compare the performance of a flat method in JavaScript and Test 3: Lodash. JavaScript flat() Lodash flatten() Lodash flatten method performance test import lodash from 'lodash'; 

const nonFlattnedArray = [...]; // 30 elements

console.time('lodash-flat');

lodash.flatten(nonFlattnedArray);

console.timeEnd('lodash-flat'); 0.153ms Lodash flatten operation execution time: [Running] node "/personal/lodash_vs_js/lodash-flat.js"
lodash-flat: 0.153ms

[Done] exited with code=0 in 0.09 seconds JavaScript native flat method performance test const nonFlattnedArray = [...]; // 30 elements

console.time('js-flat');

nonFlattnedArray.flat();

console.timeEnd('js-flat'); 0.088ms JavaScript flat operation execution time: [Running] node "/personal/lodash_vs_js/js-flat.js"
js-flat: 0.088ms

[Done] exited with code=0 in 0.058 seconds So in the third test, the native JavaScript flat method is almost 90% faster than Lodash flatten method. In this test, I want to compare the performance of the sort method in JavaScript and Lodash. Test 4: JavaScript sort() Lodash sortBy() Lodash sort method performance test import lodash from 'lodash'; 

const randomArray = [...]; // 100 elements

console.time('lodash-sort');

lodash.sortBy(randomArray);

console.timeEnd('lodash-sort'); 0.905ms Lodash sort operation execution time: [Running] node "/personal/lodash_vs_js/lodash-sort.js"
lodash-sort: 0.905ms

[Done] exited with code=0 in 0.092 seconds JavaScript native sort method performance test const randomArray = [...]; // 100 elements

console.time('js-sort');

randomArray.sort();

console.timeEnd('js-sort'); 0.118ms JavaScript sort operation execution time: [Running] node "/personal/lodash_vs_js/js-sort.js"
js-sort: 0.118ms

[Done] exited with code=0 in 0.059 seconds So in the fourth test, the native JavaScript sort method is almost 700% faster than Lodash's sort method. In this test, I want to compare the performance of the find method in JavaScript and Lodash. Test 5: JavaScript find() Lodash find() Lodash find method performance test import lodash from 'lodash'; 

const data = [...]; // 100 elements

console.time('lodash-find');

lodash.find(data, ({ name }) => name === 'Camryn');

console.timeEnd('lodash-find'); 0.294ms Lodash find operation execution time: [Running] node "/personal/lodash_vs_js/lodash-find.js"
lodash-find: 0.294ms

[Done] exited with code=0 in 0.091 seconds JavaScript native find method performance test const data = [...]; // 100 elements

console.time('js-find');

data.find(({name}) => name === 'Camryn');

console.timeEnd('js-find'); 0.133ms JavaScript find operation execution time: [Running] node "/personal/lodash_vs_js/js-find.js"
js-find: 0.133ms

[Done] exited with code=0 in 0.059 seconds So in the fifth test, the native JavaScript find method is almost 200% faster than Lodash find method. In this test, I want to compare the performance of the forEach method in JavaScript and Lodash. Test 6: JavaScript forEach() Lodash forEach() Lodash forEach method performance test import lodash from 'lodash'; 

const data = [...]; // 100 elements

console.time('lodash-forEach');

lodash.forEach(data, (item) => {
    item.checked = true;
});

console.timeEnd('lodash-forEach'); 0.148ms Lodash forEach operation execution time: [Running] node "/personal/lodash_vs_js/lodash-forEach.js"
lodash-forEach: 0.148ms

[Done] exited with code=0 in 0.091 seconds JavaScript native forEach method performance test const data = [...]; // 100 elements

console.time('js-forEach');

data.forEach((item) => {
    item.checked = true;
});

console.timeEnd('js-forEach'); 0.099ms JavaScript forEach operation execution time: [Running] node "/personal/lodash_vs_js/js-forEach.js"
js-forEach: 0.099ms

[Done] exited with code=0 in 0.059 seconds So, in the sixth test, native JavaScript forEach is almost 50% faster than Lodash's forEach method. Lodash is a very powerful tool in the hands of a developer, but you have to be very careful with it and use it wisely. I'm sure there are certain cases where we need Lodash, but in general we should avoid using third party libraries prefering native methods if posible. You can find all examples on my Conclusion: GitHub P.S I really like Lodash, the purpose of this article is for developers to use it for its intended purpose

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