What is the impact of array size on map vs foreach in JavaScript?

What is the impact of array size on map vs foreach in JavaScript?

The impact of array size on map vs foreach can be significant. The map method creates a new array, while foreach does not. For larger arrays, map may consume more memory.

So, if I have a very large array, should I prefer map over foreach?

It depends on your use case. If you need a new array with transformed values, use map. If you're just iterating without needing a new array, foreach is more efficient.

Are there any performance benchmarks comparing the two?

Yes, benchmarks show that map can be slower than foreach for large arrays due to the overhead of creating a new array. However, the difference may be negligible for smaller arrays.

What about readability? Is one more readable than the other?

Map is often considered more readable when transforming data, as it clearly indicates that a new array is being created. Foreach is straightforward for simple iterations.