What are the performance differences between various array iteration methods in JavaScript?

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

The performance can vary based on the method used. Generally, traditional for loops are faster than forEach and map because they have less overhead.

Why is the for loop faster? Can you explain the overhead?

For loops have less function call overhead since they don't create a new function context for each iteration, unlike forEach and map.

Are there any scenarios where forEach or map would be preferable?

Yes, forEach and map can be more readable and concise, making them preferable for code clarity, especially in functional programming.

What about performance in large datasets?

In large datasets, the difference in performance can become more noticeable. It's often best to benchmark in your specific use case.