That seems highly unlikely.

I'm going off of what I've seen myself, and what I've seen in the xi editor:

https://github.com/google/xi-editor

"The protocol for front-end / back-end communication, as well as between the back-end and plug-ins, is based on simple JSON messages. I considered binary formats, but the actual improvement in performance would be completely in the noise. Using JSON considerably lowers friction for developing plug-ins, as it’s available out of the box for most modern languages, and there are plenty of the libraries available for the other ones."