This might not help in this particular case, but I recently learned that a template gets rendered and send over the websocket connection every time the socket assigns are changed when it isn’t in the .leex format, so when it is a .eex file. Just changing all file formats to .leex reduced the websocket traffic by a lot! So, whenever you do <%= render "my_template.html", assigns %> inside a template, make sure that my_template is of the format .leex 
