[NickSharp]

We tried HHVM for use with our "normal" PHP.

There was a measurable performance increase, but it was disappointing overall. Perhaps my initial hopes were too high.

Our company is small and engineering/ops resources are very limited, leading to a lot of pragmatic decisions. After a few days of experimentation, I decided that HHVM was promising, but for us it's not yet worth the extra ops infrastructure.

We get much bigger improvements tuning other pieces of our stack.