Use uvloop as an asyncio reactor event loop

poetry.lock

@@ -1523,6 +1523,19 @@ brotli = ["brotlipy (>=0.6.0)"]
 secure = ["certifi", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "ipaddress", "pyOpenSSL (>=0.14)"]
 socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
 
+[[package]]
+name = "uvloop"
+version = "0.17.0"
+description = "Fast implementation of asyncio event loop on top of libuv"
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
+[package.extras]
+dev = ["Cython (>=0.29.32,<0.30.0)", "Sphinx (>=4.1.2,<4.2.0)", "aiohttp", "flake8 (>=3.9.2,<3.10.0)", "mypy (>=0.800)", "psutil", "pyOpenSSL (>=22.0.0,<22.1.0)", "pycodestyle (>=2.7.0,<2.8.0)", "pytest (>=3.6.0)", "sphinx-rtd-theme (>=0.5.2,<0.6.0)", "sphinxcontrib-asyncio (>=0.3.0,<0.4.0)"]
+docs = ["Sphinx (>=4.1.2,<4.2.0)", "sphinx-rtd-theme (>=0.5.2,<0.6.0)", "sphinxcontrib-asyncio (>=0.3.0,<0.4.0)"]
+test = ["Cython (>=0.29.32,<0.30.0)", "aiohttp", "flake8 (>=3.9.2,<3.10.0)", "mypy (>=0.800)", "psutil", "pyOpenSSL (>=22.0.0,<22.1.0)", "pycodestyle (>=2.7.0,<2.8.0)"]
+
 [[package]]
 name = "webencodings"
 version = "0.5.1"
@@ -1633,7 +1646,7 @@ url_preview = ["lxml"]
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7.1"
-content-hash = "9d74da808739e4c3d15a2d3473f01ad419f62aec8bf28613b03bd69136c4745b"
+content-hash = "d5e09dd26ae2f64ba4a9defe9d9cae6fb895ac56790c2fbf58be88b67d08e1a5"
 
 [metadata.files]
 attrs = [
@@ -2000,7 +2013,10 @@ keyring = [
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 ]
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 lxml = [
@@ -2313,12 +2329,34 @@ psycopg2cffi-compat = [
     {file = "psycopg2cffi-compat-1.1.tar.gz", hash = "sha256:d25e921748475522b33d13420aad5c2831c743227dc1f1f2585e0fdb5c914e05"},
 ]
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+    {file = "pyasn1_modules-0.2.8-py3.5.egg", hash = "sha256:426edb7a5e8879f1ec54a1864f16b882c2837bfd06eee62f2c982315ee2473ed"},
+    {file = "pyasn1_modules-0.2.8-py3.6.egg", hash = "sha256:cbac4bc38d117f2a49aeedec4407d23e8866ea4ac27ff2cf7fb3e5b570df19e0"},
+    {file = "pyasn1_modules-0.2.8-py3.7.egg", hash = "sha256:c29a5e5cc7a3f05926aff34e097e84f8589cd790ce0ed41b67aed6857b26aafd"},
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@@ -2798,6 +2836,38 @@ urllib3 = [
     {file = "urllib3-1.26.8-py2.py3-none-any.whl", hash = "sha256:000ca7f471a233c2251c6c7023ee85305721bfdf18621ebff4fd17a8653427ed"},
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 ]
+uvloop = [
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+    {file = "uvloop-0.17.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:68532f4349fd3900b839f588972b3392ee56042e440dd5873dfbbcd2cc67617c"},
+    {file = "uvloop-0.17.0-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:0949caf774b9fcefc7c5756bacbbbd3fc4c05a6b7eebc7c7ad6f825b23998d6d"},
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+    {file = "uvloop-0.17.0.tar.gz", hash = "sha256:0ddf6baf9cf11a1a22c71487f39f15b2cf78eb5bde7e5b45fbb99e8a9d91b9e1"},
+]
 webencodings = [
     {file = "webencodings-0.5.1-py2.py3-none-any.whl", hash = "sha256:a0af1213f3c2226497a97e2b3aa01a7e4bee4f403f95be16fc9acd2947514a78"},
     {file = "webencodings-0.5.1.tar.gz", hash = "sha256:b36a1c245f2d304965eb4e0a82848379241dc04b865afcc4aab16748587e1923"},

pyproject.toml

@@ -207,6 +207,7 @@ hiredis = { version = "*", optional = true }
 Pympler = { version = "*", optional = true }
 parameterized = { version = ">=0.7.4", optional = true }
 idna = { version = ">=2.5", optional = true }
+uvloop = { version = ">=0.17.0", optional = true }
 
 [tool.poetry.extras]
 # NB: Packages that should be part of `pip install matrix-synapse[all]` need to be specified
@@ -229,6 +230,7 @@ redis = ["txredisapi", "hiredis"]
 # Required to use experimental `caches.track_memory_usage` config option.
 cache_memory = ["pympler"]
 test = ["parameterized", "idna"]
+uvloop = ["uvloop"]
 
 # The duplication here is awful. I hate hate hate hate hate it. However, for now I want
 # to ensure you can still `pip install matrix-synapse[all]` like today. Two motivations:
@@ -260,6 +262,8 @@ all = [
     "txredisapi", "hiredis",
     # cache_memory
     "pympler",
+    # uvloop
+    "uvloop",
     # omitted:
     #   - test: it's useful to have this separate from dev deps in the olddeps job
     #   - systemd: this is a system-based requirement

synapse/__init__.py

@@ -44,6 +44,12 @@ if bool(os.environ.get("SYNAPSE_ASYNC_IO_REACTOR", False)):
 
         from twisted.internet import asyncioreactor
 
+        if bool(os.environ.get("SYNAPSE_UVLOOP", False)):
+            import uvloop
+
+            uvloop.install()
+            print("Using uvloop")
+
         asyncioreactor.install(asyncio.get_event_loop())
     except ImportError:
         pass