Perhaps my first feedback on Catodon.rocks: search isn't working (edit: seems like search errors sometimes, not all times; I got results using another query, maybe it's the query?). As you can see in the screenshot, I tried a simple search (it was set to "Remote servers" when I took screenshot, but I initially tried with the default "All") and I got an error. The DevTools shows a 500 and the response JSON includes a reference to "canceling statement due to statement timeout" (an error message of which isn't echoed in the UI). To be fair, I don't remember if Calckey's search ever worked, either, so this may be something platform-wise, not instance-wise.
Also, while I was composing this post, my DevTools was opened on my secondary screen and I spotted some 429s ("Too many requests") from Catodon requesting itself (and potentially DDoSing itself) every 5-10 seconds (depending on user gestures). Edit: seems like this behavior happens for specific screens, as the request flow became more calm after I reloaded the tab and headed to my own note to edit it. It's worth mentioning the behavior I described happened even with the "Disable real-time timeline updates" which I set up shortly after creating my account (as I set the same preferences I had set in Calckey). I'm going to turn off the "Automatically load more" which is currently on to see if this improves things and makes it easier on the server load.
(Edited to state some things I observed after I originally posted this)
#catodon