Description

Spaces room list (_matrix/client/unstable/org.matrix.msc2946/rooms/<room_id>) takes considerable amount of time to serve (20-60 seconds), which does not seem to be either justified or desirable. (A good example is #osm-space:matrix.org, which contains rooms and spaces as well and takes 20-30 seconds.)

First, room list is quite static most of the time, so caching it (and invalidate cache on change) seems to be desirable, especially if the long query time is justified.

However I do not see any real resource usage there (admittedly without analysing the code): both cpu and psql seems not to be busy.

Steps to reproduce

• see space room list
• observe the spinner

Version information

• Homeserver: grin.hu
• Version: 1.38.1