The following call chains are replaced by this inspection:
Collection.stream().count() → Collection.size(). In Java 8 Collection.stream().count()
actually iterates over collection elements to count them while Collection.size() is much faster for most of collections.Stream.flatMap(Collection::stream).count() → Stream.mapToLong(Collection::size).sum(). Similarly
there's no need to iterate all the nested collections. Instead, their sizes could be summed up.