How to get a list of VKontakte friends of several people?

Question

In contact with

Do I need to get the list of friends of 100 specific users of a contact? 100 separate requests take quite a long time to complete. Is it possible to get this data faster?

https://api.vkontakte.ru/method/friends.get?user_i...

This query will return a list of people who are also friends of the listed contact users, and I want the full list of friends.