room creation can be surprisingly slow

[richvdh]

... even when no remote users are involved

[richvdh]

eg:

2019-09-19 17:39:43,730 - synapse.access.http.8080 - 233 - INFO - POST-6805839 - 80.250.101.234 - 8080 - Received request: POST /_matrix/client/r0/createRoom
2019-09-19 17:39:45,111 - synapse.handlers.room - 714 - INFO - POST-6805839 - Sending m.room.create in new room
2019-09-19 17:39:47,392 - synapse.handlers.room - 728 - INFO - POST-6805839 - Sending m.room.member in new room
2019-09-19 17:39:48,170 - synapse.handlers.room - 714 - INFO - POST-6805839 - Sending m.room.power_levels in new room
2019-09-19 17:39:48,362 - synapse.handlers.room - 714 - INFO - POST-6805839 - Sending m.room.join_rules in new room
2019-09-19 17:39:48,474 - synapse.handlers.room - 714 - INFO - POST-6805839 - Sending m.room.history_visibility in new room
2019-09-19 17:39:48,537 - synapse.handlers.room - 714 - INFO - POST-6805839 - Sending m.room.guest_access in new room
2019-09-19 17:39:48,640 - synapse.access.http.8080 - 302 - INFO - POST-6805839 - 80.250.101.234 - 8080 - {@matthew:matrix.org} Processed request: 4.910sec/0.000sec (0.016sec, 0.020sec) (0.972sec/0.451sec/33) 45B 200 "POST /_matrix/client/r0/createRoom HTTP/1.1" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:69.0) Gecko/20100101 Firefox/69.0" [0 dbevts]

5 seconds? WTF is it doing?

[crespinb]

same, for some reason it's taking several seconds to create a room even with an empty "invite" parameter

[MadLittleMods]

Related to #1545