We did. We used Cython where we could, but Cython doesn't work with Twisted (or at least inline deferreds, which holy we had everywhere), due to different gener

We did. We used Cython where we could, but Cython doesn't work with Twisted (or at least inline deferreds, which holy we had everywhere), due to different generator semantics. Edit: in fact, our internal protobuf lib was all generated Cython. We had a code-gen inception.