What are the ways to count items in Magento 2?

there are two ways to count products in Magento 2: the getSize() method and count().

Among the two, getSize() is considered a more efficient method since there’s no need to load a collection time and time again wherever there’s a need to count items.

On the contrary, the count() method slows down the app’s performance, as it requires reloading the collection to get an updated number value. As a result, your app drains a lot of resources and is difficult to maintain.