We certainly did. HHVM doesn't support postgres well straight out of the box. We managed to patch a third-party driver to give us the functionality we needed.

We certainly did. HHVM doesn't support postgres well straight out of the box. We managed to patch a third-party driver to give us the functionality we needed. https://github.com/PocketRent/hhvm-pgsql https://github.com/PocketRent/hhvm-pgsql