Which is better for performance: map or forEach?

Which is better for performance: map or forEach?

It depends on what you're trying to achieve. The map method creates a new array, while forEach does not.

So, if I just want to iterate over an array without creating a new one, should I use forEach?

Yes, if you don't need a new array, forEach is more appropriate and can be slightly faster.

Are there any scenarios where map would be more beneficial?

Absolutely! If you need to transform the elements of an array and return a new array, map is the way to go.

What about performance differences in large arrays?

In large arrays, the performance difference can be noticeable. Generally, forEach may be faster since it doesn't create a new array.