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

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

In JavaScript, common array iteration methods include forEach, map, filter, and for...of. Each has different performance characteristics depending on the use case.

Can you explain how forEach compares to map in terms of performance?

Sure! forEach is generally faster for simple iterations since it doesn't create a new array, while map is slower because it creates a new array with the results.

What about the performance of filter compared to forEach?

filter is typically slower than forEach because it creates a new array containing only the elements that pass the test implemented by the provided function.

Are there any scenarios where using forEach is better than using a traditional for loop?

Yes, forEach can be more readable and concise for simple iterations, but traditional for loops can be more performant in cases where you need to break out of the loop early.