[monopede]

I understand that this is meant just as an experience report, but I have to say this article didn't convince me in any way that this rewrite was a good idea. Obvious questions:

1. How does the performance of the new system compare to the old system?

2. What exactly were those maintenance issues with the Erlang server? Did just no-one in your team find the time to learn Erlang well enough? I know Erlang isn't the prettiest of languages, but async I/O isn't the only advantage of Erlang. A battle-tested concurrent runtime and built-in support for fault-tolerance are two obvious examples.

[MetaCosm]

But, but, so pretty and elegant!

  quick_sort([]) ->
      [];
  quick_sort([H | T]) ->
      quick_sort([X || X <- T, X < H]) ++ [H] ++ quick_sort([X || X <- T, X >= H]).