How can I optimize array iteration performance in JavaScript?

How can I optimize array iteration performance in JavaScript?

To optimize array iteration in JavaScript, consider using methods like forEach, map, or traditional for loops. Each has its own performance characteristics.

What are the performance differences between forEach and a traditional for loop?

A traditional for loop is generally faster than forEach because it avoids the overhead of function calls. However, forEach is more readable and easier to use.

Are there any specific scenarios where one is better than the other?

Yes, if you're working with large datasets and performance is critical, a traditional for loop is preferable. For smaller datasets or when readability is a priority, forEach is great.

What about using the map function? Is it efficient?

The map function is efficient for transforming arrays, but it creates a new array, which can add overhead. Use it when you need the transformed result.