What is the performance difference between forEach and map?

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

Sure! The main difference is that map creates a new array with the results of calling a function on every element, while forEach executes a provided function once for each array element without returning anything.

So, which one is faster?

Generally, forEach can be slightly faster since it doesn't create a new array. However, the performance 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 create a new array. Use forEach when you just want to execute a function for side effects without needing a new array.

What about readability? Does one have an advantage over the other?

map can be more readable when you're transforming data, as it clearly indicates that a new array is being created. forEach is straightforward for side effects, but it may not convey intent as clearly.