What are the performance differences between forEach and map?

Can you explain the performance differences between forEach and map in JavaScript?

Sure! The main difference is that forEach executes a function on each element but doesn't return a new array, while map creates a new array with the results of calling a function on every element.

So, which one is faster?

Generally, forEach can be slightly faster since it doesn't create a new array. However, the difference is often negligible for small arrays.

Are there any scenarios where I should prefer one over the other?

Yes! Use map when you need to transform data and return a new array. Use forEach when you just want to perform an action on each element without needing a new array.

What about readability? Does one method make the code clearer?

Map is often more readable for transformations since it clearly indicates that you're creating a new array. forEach is better for side effects.