You shouldn’t to length like this. This will always iterate and count the full list.

Use something like match?([_|_], @users) instead.

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

I had a similar issue with conditional rendering with liveview. I posted an issue but I just haven’t had enough time to create a reproduction repo publically (client project). In my case it seemed like it might be related to a nested liveview inside a conditional in a liveview template. Still don’t have a fix for it, I just changed the way I was rendering things to work around needing the if statement. I’ll post here if I do figure it out.