Review on HHVM by Sheppard Priest

It's fast, it can handle huge amounts of traffic with ease! The only thing that I don't like about this product are its limits (at least to my knowledge). If you need more resources than what your server has available then maybe there isn’t anything better out here? But if not - go ahead because everything else will be great as well :) We use Hhvm at work so we have been able solve all our problems regarding performance issues without having any downtime or other side effects from using such tools before them were even invented ;).