What is the fastest java collection to retrieve a large number of DTOs?

I am returning a large number of collections from a DTO object and was wondering if anyone could point me in the right direction. Any type of collection will work, but I do not know which one is best for the task of returning a large number of objects.

I know this can change based on threads and the like, but I'm at least looking for general recommendations and tests. In addition, I must stay within the standard Java collections (no third-party libraries).