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](https://matrix-org.github.io/synapse/latest/deprecation_policy.html) 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](https://github.com/matrix-org/synapse/issues/11583))

Internal Changes
----------------

- Work around a build problem on Debian Buster. ([\#11625](https://github.com/matrix-org/synapse/issues/11625))
-----BEGIN PGP SIGNATURE-----

iQEzBAABCAAdFiEEv27Axt/F4vrTL/8QOSor00I9eP8FAmHCEeYACgkQOSor00I9
eP/08Af+OSsyV4/yUorDrkn+FUykc+Gwoj0tw/Wqwm+KohgV4JRdUwaBrvPuKSe/
N7emplKs16hZJwOWh2P/9B0ELG76QzImL946rmF6/JtOX/Y2Wc4KDtaY/CF//ssV
+f4oK78XZCZVIKZCPks57P3NSiTDffxfoKeuoQ1i09VN21kmGS3xI8CSxT8giken
X4Ocp93S727S2bEX6VfvO1CyD4M3hPS+xfjeB4E0U6QcIBQ4oC+pF76PDJ0slHYs
rhW6CRv3D1V+Igepez48ky71hRU40piP5TFXQ94G1U7Efp5qeuGeqjXt2JwuS5u4
mYb0Eq8rOxFGknTNnZtp4ZWcmO+xbQ==
=BmGg
-----END PGP SIGNATURE-----