What is the performance of the for-of loop in JavaScript?

What is the performance of the for-of loop in JavaScript?

The for-of loop is generally slower than traditional for loops and forEach, especially for large arrays.

Why is it slower? Is it due to the way it iterates?

Yes, the for-of loop creates an iterator for the array, which adds overhead compared to direct indexing in traditional loops.

Are there scenarios where for-of is preferred despite the performance hit?

Absolutely! For-of is more readable and works well with iterable objects like Sets and Maps, making it a good choice for clarity.

Can you give an example of using for-of with a Set?

Sure! Here's an example:

const mySet = new Set([1, 2, 3]);
for (const value of mySet) {
    console.log(value);
}