Nice downvotes. Someone doesn't like the truth. VK basically ripped Facebook verbatim. Now Telegram or whatever its called. They are basically the Russian version of the Samwer brothers.
The downvotes are because no one cares about whether VK ripped Facebook, and your comment is nonsensical.
If this project is not based on the source code of HHVM there is no way a conclusion can be made about its features or performance compared to HHVM, regardless of any relation between VK and FB.