What are the performance differences between map, filter, and forEach in JavaScript?

What are the performance differences between map, filter, and forEach in JavaScript?

The main differences lie in their purpose and return values. 'map' creates a new array by applying a function to each element, 'filter' creates a new array with elements that pass a test, and 'forEach' executes a function on each element without returning anything.

Which one is the fastest?

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

Does using map or filter have any advantages over forEach?

Yes, 'map' and 'filter' are more expressive and can lead to cleaner code when you need to transform or filter data. They also return new arrays, which can be useful.

Are there any scenarios where I should avoid using these methods?

If performance is critical and you're working with very large arrays, a traditional loop might be more efficient. Also, avoid them if you don't need the returned array.