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GeezerVison is showing github.com — uvloop 0.23.0 by fantix · Pull Request #768 · MagicStack/uvloop

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@fantix

@fantix fantix commented Sep 30, 2026

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Changes

  • Add Python 3.15 and 3.15t wheel builds and CI coverage (Add Python 3.15 to CI and fix test issues #758)
    (by @honglei @fantix in f7c0547)

  • Add support for the eager_start keyword argument in create_task() (feat(loop): support eager_start in loop.create_task #748)
    (by @samypr100 in 3cbb095 for support **kwargs on loop.create_task like in 3.13 and 3.14 #746 (Feature request) loop.create_task to accept arbitrary **kwargs #718)

  • Add thread name prefix to the default thread pool executor (Add thread name prefix to the default thread pool executor #636)
    (by @inikolaev @fantix in 0582f94 for Set thread name prefix for default event loop thread pool #562)

  • Add support for special hostname <broadcast> (Add support for special hostname <broadcast> #592)
    (by @jpbede in 3060ceb for sendto fails if ip address is "<broadcast>" #540)

  • Upgrade libuv to v1.52.1 (Upgrade libuv to v1.52.1 #753)
    (by @fantix in e8efea4 for Bump bundled libuv to ≥1.49 so io_uring isn't silently on by default #752)

  • Improve performance by using Python C API to enter/exit context (Improve performance by using Python C API to enter/exit context #627)
    (by @tarasko in 837ef22)

  • Improve performance/latency of Transport.write (Improve performance and reduce latency of Transport.write by attempting to send data immediately if all write buffers are empty #619)
    (by @tarasko in 1d9b6e0)

  • Replace some SSL vectorcall with direct methods (Improve SSL performance by calling SSLProtocol methods directly, not through the python's vectorcall interface #626)
    (by @tarasko in 6a27cbe)

  • Optimize SSL buffered reads using C values (Improve SSL performance by avoiding SSLWantReadError exception and using much faster checks whenever possible #629)
    (by @tarasko in a308f75)

Fixes

  • Detach socket on create_connection cancellation to prevent fd double-close (Detach socket on create_connection cancellation to prevent fd double-close #740)
    (by @junjzhang @fantix in dc680eb for Information exposure bug: response leaking to wrong requests in uvicorn-based server under heavy load #645 create_connection(sock=sock) does not detach socket on cancellation, causing fd double-close #738)

  • Remove loop._ready_len in favor of len(loop._ready) (Fix race conditions on loop._ready_len #721)
    (by @x42005e1f in 5910a18 for loop.call_soon_threadsafe() behaves as non-thread-safe in free-threading #720)

  • Prefer inspect.iscoroutinefunction (Do not use deprecated asyncio.iscoroutinefunction #705)
    (by @MatthieuDartiailh in fd65027 for DeprecationWarning: 'asyncio.iscoroutinefunction' is deprecated in uvloop.loop.Loop.run_in_executor in Python 3.14 #703)

  • Fix context tests by explicitly yielding after run_in_executor (fix(tests): explicit yield in test_create_ssl_server_manual_connection_lost #743)
    (by @samypr100 in 6cd24cb)

  • Fix test_create_connection_open_con_addr with Python 3.13.9+ (Fix test test_create_connection_open_con_addr with Python 3.13.9+ #713)
    (by @shadchin in b93141a for tests/test_tcp.py::Test_AIO_TCP::test_create_connection_open_con_addr fails on Python 3.13.9 #701)

  • Skip flaky test_cancel_post_init on asyncio 3.13+ (test: skip flaky test_cancel_post_init on AIO 3.13+ #714)
    (by @fantix in 3ea5c85 for tests/test_process.py::TestAsyncio_AIO_Process::test_cancel_post_init fails randomly #709)

  • Fix flaky test_fs_event (test: fix flaky test_fs_event #717)
    (by @fantix in 8da4547)

  • Use C __atomic builtins for debug counters (test: use C __atomic builtins for debug counters #719)
    (by @fantix in 836e3b2)

  • Update the example to work with Python 3.14 (Update the example to work with 3.14 #710)
    (by @Jamie-Chang in b74c2f1)

Build

  • Replace pkg_resources with packaging and use Cython 3.1 (fix(build): use packaging instead of relying on pkg_resources from setuptools #742)
    (by @samypr100 in b377b7c for Use of deprecated / removed pkg_resources #729)

  • Remove wheel as a build dependency (Get rid of wheel as a dependency #696)
    (by @DimitriPapadopoulos in 173e88c)

  • Support any number of flags in UVLOOP_OPT_CFLAGS (Support any number of flags in UVLOOP_OPT_CFLAGS #630)
    (by @mgorny in 963a5f3)

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@fantix
uvloop 0.23.0
c5f7deb 
Changes
=======

* Add Python 3.15 and 3.15t wheel builds and CI coverage (#758)
  (by @honglei @fantix in f7c0547)

* Add support for the `eager_start` keyword argument in create_task() (#748)
  (by @samypr100 in 3cbb095 for #746 #718)

* Add thread name prefix to the default thread pool executor (#636)
  (by @inikolaev @fantix in 0582f94 for #562)

* Add support for special hostname `<broadcast>` (#592)
  (by @jpbede in 3060ceb for #540)

* Upgrade libuv to v1.52.1 (#753)
  (by @fantix in e8efea4 for #752)

* Improve performance by using Python C API to enter/exit context (#627)
  (by @tarasko in 837ef22)

* Improve performance/latency of Transport.write (#619)
  (by @tarasko in 1d9b6e0)

* Replace some SSL vectorcall with direct methods (#626)
  (by @tarasko in 6a27cbe)

* Optimize SSL buffered reads using C values (#629)
  (by @tarasko in a308f75)

Fixes
=====

* Detach socket on create_connection cancellation to prevent fd double-close (#740)
  (by @junjzhang @fantix in dc680eb for #645 #738)

* Remove `loop._ready_len` in favor of `len(loop._ready)` (#721)
  (by @x42005e1f in 5910a18 for #720)

* Prefer inspect.iscoroutinefunction (#705)
  (by @MatthieuDartiailh in fd65027 for #703)

* Fix context tests by explicitly yielding after run_in_executor (#743)
  (by @samypr100 in 6cd24cb)

* Fix test_create_connection_open_con_addr with Python 3.13.9+ (#713)
  (by @shadchin in b93141a for #701)

* Skip flaky test_cancel_post_init on asyncio 3.13+ (#714)
  (by @fantix in 3ea5c85 for #709)

* Fix flaky test_fs_event (#717)
  (by @fantix in 8da4547)

* Use C __atomic builtins for debug counters (#719)
  (by @fantix in 836e3b2)

* Update the example to work with Python 3.14 (#710)
  (by @Jamie-Chang in b74c2f1)

Build
=====

* Replace pkg_resources with packaging and use Cython 3.1 (#742)
  (by @samypr100 in b377b7c for #729)

* Remove wheel as a build dependency (#696)
  (by @DimitriPapadopoulos in 173e88c)

* Support any number of flags in UVLOOP_OPT_CFLAGS (#630)
  (by @mgorny in 963a5f3)
edgedb-ci
edgedb-ci approved these changes Sep 30, 2026
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@github-actions
github-actions Bot merged commit c5f7deb into master Sep 30, 2026
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@MatthieuDartiailh

MatthieuDartiailh commented Sep 30, 2026

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The PyPI publishing failed (invalid trusted publisher credentials).
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@fantix

fantix commented Sep 30, 2026

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Yeah unfortunately - let me fix that!
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@MatthieuDartiailh

MatthieuDartiailh commented Oct 1, 2026

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I saw the release on PyPI. Thanks @fantix
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@fantix
fantix deleted the 0.23.0 branch October 1, 2026 13:05
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@fantix @MatthieuDartiailh @edgedb-ci
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