Both map() and forEach() are array methods in JavaScript that are used to iterate over each item in an array. However, they have different functionalities and therefore perform differently in certain…

JSPlainEnglish's platform is a resource for JavaScript developers, offering insights into JavaScript fundamentals, modern web development techniques, and JavaScript frameworks. Through articles, tutorials, and code snippets, JSPlainEnglish offers insights into JavaScript language features, ES6 syntax, and functional programming concepts. Readers can learn about building interactive web applications, working with JavaScript libraries, and optimizing frontend performance to create engaging user experiences.

JavaScript in Plain English

Which is Faster in JavaScript map vs. forEach? In this article, we will explore the differences between and and how they affect performance. The method is used to create a new array by performing a function on each element of an array. It returns a newarray with the same number of elements as the original array.

Which is Faster in JavaScript map vs. forEach?

Please, don’t use map as a forEach. There’s a reason why these 2 functions exist separately.

I think it would be interesting to see the performance differences in a different scenario rather than the one mentioned here e.g.
Since another benefit of the <code>map</code> is its usage to return a new array of Promises, a comparison could be made between using <code>forEach</code> and <code>await</code> inside the callback VS returning an array of Promises with <code>map</code> and calling <code>await Promise.all(...)</code>

I agree with <a href="https://app.daily.dev/bradscript" data-mention-id="Y6DmBOOhO8cu3OE3hzlFJ" data-mention-username="bradscript">@bradscript</a>, there’s a reason why these functions exist. A more meaningful comparison might be for…of vs forEach to iterate the array. Map, on the other hand, is to transform an array and not iterating the array.

This article was already posted here and provides no good value:
<a href="https://app.daily.dev/posts/Z3zj97hFh" target="_blank" rel="noopener nofollow">https://app.daily.dev/posts/Z3zj97hFh</a>
This is making me lose faith in this app.