Collections.reverse() vs Lists.reverse() which one is faster?

Question

I am interested in following question: Collections.reverse() vs Lists.reverse() which one is faster?

Thanks.

Answer 1

They do different things.

Collections.reverse takes a mutable list and reverses its order. It takes linear time. It has to.

Guava's Lists.reverse returns a view of the list that is reversed. It returns in constant time, but you'll pay the (small) overhead of the view for each operation.