Modern XMPP project discussion - 2025-11-03

Kris, how well does the Deltachat server scale in terms of users, rooms, number of participants, amount of messages exchanged, etc.?

Mostly compared to Prosody or Ejabberd.

the issue with DeltaChat and group-chats isn't that.

the issue is that it doesn't really have a concept of group-chats, but just pretends so by basically emailing everyone in CC.

so it is up to every individual client to make sure they send messages to all participants, and split brain group-chats can easily happen

on small private group-chats that isn't a problem, but I find it a bit misleading that DeltaChat proponents claim that they can do group-chats with 1000 participants with no problem.

under ideal simulated conditions maybe

So it scales extremely badly for vanstabholme’s usecase, gotcha.