Synapse 1.49.2 (2021-12-21)

This release fixes a regression introduced in Synapse 1.49.0 which could cause /sync requests to take significantly longer. This would particularly affect "initial" syncs for users participating in a large number of rooms, and in extreme cases, could make it impossible for such users to log in on a new client.

Note: in line with our deprecation policy for platform dependencies, this will be the last release to support Python 3.6 and PostgreSQL 9.6, both of which have now reached upstream end-of-life. Synapse will require Python 3.7+ and PostgreSQL 10+.

Note: We will also stop producing packages for Ubuntu 18.04 (Bionic Beaver) after this release, as it uses Python 3.6.

Bugfixes

• Fix a performance regression in /sync handling, introduced in 1.49.0. (#11583)

Internal Changes

• Work around a build problem on Debian Buster. (#11625)