ZeroRPC TCP vs Flask HTTP in Electron

[petef19]

Hello,
looking for guidance and experienced feedback.
Have an Electron app that communicates to the Python backend Flask server via http.
Node sends a json string to the Py API, and the Py API also responds via json.

Would switching to ZeroRPC and tcp communication speed up the communication with the Py API?
Are there any limits on the length of the json string message?
Any other Electron specific gotchas I'd need to be aware of?

Thanks!