I don't have a clear impression about Elixir language yet. I don't like it has Ruby like syntax, but do like it has pipe operator and macros. So, Fibonacci:It executes in about 13 seconds which is on pair (even faster for unknown reason) with Erlang, no surprises here.D (GDC) - 0.990C# - 1.26D (DMD) - 1.3C++ - 1.33F# - 1.38Nemerle - 1.45Rust - 1.66Go - 2.38Haskell - 2.8Clojure - 9Elixir - 13Erlang - 17Ruby - 60Python - 120