> Java scales just fine thanks. FWIW, Mibbit handles a good number more messages
  > per day that twitter. On a single VPS with 1.4GB ram, running Java.

I wasn't talking about that. Message passing is trivial and scale on any language, or at least it should be. Well, unless you do Java and XML. That doesn't scale, from experience. Unless something changed in the last couple of years I'm not aware of. (Just taking your red herring further, to show it doesn't make sense and it has nothing to do with what I said.)

Third time lucky, I hope. My point is I seriously doubt Scala is much better at scaling than Ruby, Python, or PHP. And the author seems to have based his opinion on his experience refactoring Twitter components previously coded in Ruby in Scala. Caveat emptor, I wasn't at the conference and this rant is second hand via a questionable source, The Register.

> My point is I seriously doubt Scala is much better at scaling than Ruby

I spoke with some people at Twitter the other day. They said that they were switching to Scala just to annoy alecco on Hacker News. The performance and scaling advantages are entirely negligible.