This library provides efficient implementations for small maps and vectors, discussed more in this post. These implementations will eventually be merged into Clojure proper, but for now can be used by replacing vector with clj-tuple/vector and hash-map with clj-tuple/hash-map.
[clj-tuple "0.2.2"]clj-tuple> (vector 1 2 3)
[1 2 3]
clj-tuple> (hash-map 1 2 3 4)
{1 2, 3 4}Copyright © 2015 Zachary Tellman
Distributed under the MIT License