[p-hk]

I can't vouch for them, but there are Clojure[1] and C[2] implementations you might consider.

[1] https://github.com/clojure/core.rrb-vector

[2] https://github.com/hyPiRion/c-rrb

[prospero]

Here’s one in Java: https://github.com/lacuna/bifurcan/blob/master/src/io/lacuna...