OK, it's time for Clojure (again). Let's look at the (now famous :) Fibonacci function:It took ~9 seconds which's not so good as would be (however, I'm not very frustrated about that :)What about the language itself, it feels very 'tired' - it has little build-in constructs and, I believe, it's extremely flexible. Time will tell if I'm right... :)However, there's one annoying thing - lazy sequences, which I almost hate in C# (IEnumerable) because they must not be mixed with any side effects, which is rathe[...]