@egon0 Posting (From Firefox 89.0.2 on Ubuntu) is (still) incredibly slow - I see a spinning wheel for what feels like half a minute. That was the main reason that makes me say Flarum is slow compared to Discourse (where my message is posted instantly when hitting the 'publish' button).
It was suggested that there were some server issues that made Flarum slower - did you resolve those, or could it be that's why I'm experiencing the slow post?
EDIT: Ok, it's not like half a minute, but a couple of seconds 😛 Still, it feels slow.
