In reply to Bjørn Johansen (@bjornjohansen).

That's true Bjørn, and it could be used as a workaround, however it takes around 500MB of RAM to start one process, even with a powerful dedicated server that would deplete resources quickly... :-/ And also based on my (somewhat limited) understanding of how HHVM works, this would actually be a lot less optimized because all processes would have to recreate the map of the translated code pieces instead of tapping the same database.