The problem of slow joins isn't the client, it's the protocol. Just join the Synapse admins channel on matrix.org (will take half an hour to load, your client will time out and give you an error but it will load eventually) and the other admins will tell you they're all aware of the problem.
I don't know why Arathorn is further down the thread dismissing this problem.. it's a well-known problem in the community..
They're talking about a specific issue with federation at scale. I run a hybrid conference in Seattle and we use Matrix. I make a successful living out of this, so it seems a stretch to call it useless.
I don't know why Arathorn is further down the thread dismissing this problem.. it's a well-known problem in the community..
https://github.com/matrix-org/synapse/issues/1211 there's the seven year old bug