Clojure: sequence back to vector

Question

How can I cast a sequence back to vector after a sequence producing operation (like sort)? Does using (vec..) on a sequence that was a vector is costly?

One (bad?)

Answer 1

If you need to random access on the result of sort with huge vectors, then the time took by the call to vec should be far outweighed by time savings of doing so.

If you profile and find that it is too slow, you'll probably have to use java arrays.