MagicStack/uvloop

Ultra fast asyncio event loop.

Stars: 11.9k
Forks: 615
Open beginner issues: 3
Indexed issues: 131

Dominant language: Cython
License: Apache-2.0
Last GitHub push: Jul 14, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

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Access length of the ._ready queue? Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

MagicStack/uvloop#607 · 1 comment · Opened Jun 6, 2024
Qualify claim of being drop-in replacement to asyncio Open

Difficulty 2/5 1-3 hours Newbie friendliness 50/100

MagicStack/uvloop#605 · 7 reactions · Opened May 3, 2024
Server.serve_forever() isn't cancelled when Server.close() is called Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#602 · Opened Mar 14, 2024
Type annotations Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MagicStack/uvloop#597 · 1 comment · 2 reactions · Opened Mar 6, 2024
pipes from subprocess_exec do not have extra info 'pipe' (incompatible with vanilla asyncio) Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

MagicStack/uvloop#595 · 1 comment · Opened Feb 22, 2024
UDPTransport returning when data is empty Open

Difficulty 2/5 1-3 hours Newbie friendliness 42/100

MagicStack/uvloop#594 · Opened Feb 17, 2024
Attach uvloop to a running libuv event loop Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

MagicStack/uvloop#593 · 1 comment · Opened Jan 31, 2024
Current version of libuv Open

Difficulty 1/5 Under an hour Newbie friendliness 20/100

MagicStack/uvloop#589 · 1 comment · Opened Jan 15, 2024
Possible to add `_start_tls_compatible` attribute to `TCPTransport`? Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

MagicStack/uvloop#588 · 1 reaction · Opened Jan 3, 2024
Idea: changing libuv not to install a signal handler Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

MagicStack/uvloop#582 · Opened Oct 26, 2023
[ALTLinux] [ppc64le] [0.18.0] `AssertionError: Didn't reach a full buffer` Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#576 · 6 comments · Opened Oct 15, 2023
test_cython_coro_is_coroutine: python: Objects/codeobject.c:771: PyCode_Addr2Line: Assertion `addrq >= 0 && addrq < _PyCode_NBYTES(co)' failed. Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#574 · 1 comment · Opened Oct 14, 2023
TLS/SSL asyncio/uvloop leaks memory Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MagicStack/uvloop#565 · 3 comments · Opened Sep 18, 2023
start_tls: AssertionError if writing is paused Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#564 · Opened Sep 11, 2023
Add support for loop.sock_sendto Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

MagicStack/uvloop#561 · 5 comments · 3 reactions · Opened Sep 6, 2023
tranport.get_extra_info('peername') occasionally returns None Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#560 · Opened Sep 5, 2023
RFE: please provide `cython` 3.x support Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

MagicStack/uvloop#558 · 1 comment · Opened Aug 30, 2023
[Feature Request] sendfile support Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MagicStack/uvloop#549 · 1 comment · Opened Jul 18, 2023
memory from transport buffer not freed after connection_lost Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#548 · 2 comments · Opened Jul 6, 2023
0.17.0: pep517 based build fails Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MagicStack/uvloop#546 · 4 comments · Opened Jul 2, 2023
Asynchronously gathering user input seems to break in uvloop but not in default asyncio loop Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#543 · Opened May 26, 2023
no default __reduce__ due to non-trivial __cinit__ Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MagicStack/uvloop#541 · Opened May 19, 2023
getaddrinfo() returns wrong scope ID for IPv6 link-local addresses when type=SocketKind.SOCK_STREAM Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#539 · Opened May 14, 2023
Segmentation fault Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

MagicStack/uvloop#538 · 3 comments · Opened May 2, 2023
Error installing uvloop via pip for PyPy3.9 Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#537 · 15 comments · Opened Apr 18, 2023
Windows 10 support Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

MagicStack/uvloop#536 · 7 comments · Opened Apr 18, 2023
0.17.0: test suite is stuck in `tests/test_tcp.py::Test_AIO_TCPSSL::test_remote_shutdown_receives_trailing_data` unit Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MagicStack/uvloop#533 · 1 comment · Opened Mar 17, 2023
`asyncio.create_subprocess_exec`: cannot read `/dev/stdin` Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

MagicStack/uvloop#532 · 2 comments · Opened Feb 27, 2023
module search path broken for test_libuv_api.py Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

MagicStack/uvloop#530 · Opened Feb 22, 2023
test_write_pipe failures on PPC64le Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MagicStack/uvloop#529 · Opened Feb 22, 2023
uvloop is broken for abstract sockets - create_unix_connection does not work for abstract sockets as libuv does not support them Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#528 · 4 comments · Opened Feb 20, 2023
@Spetcial_bot Open

Difficulty 5/5 Over a week Newbie friendliness 1/100

MagicStack/uvloop#527 · Opened Feb 14, 2023
_monitor_fs does not seem to hold reference to callback Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#526 · Opened Feb 11, 2023
uvloop pypy3.9 error on import Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#521 · 1 comment · 2 reactions · Opened Dec 25, 2022
uvloop pypy3.9 installing problem Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

MagicStack/uvloop#518 · 1 comment · Opened Dec 14, 2022
loop.stop() different behavior with loop.run_forever() in asyncio vs. uvloop Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#517 · Opened Nov 22, 2022
Tests trying to find unused ports are flakey when automated Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

MagicStack/uvloop#513 · 1 comment · Opened Nov 9, 2022
why run_coroutine_threadsafe so slow? Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MagicStack/uvloop#510 · 1 reaction · Opened Nov 1, 2022
"RuntimeError: Racing with another loop to spawn a process" when spawning many processes from multiple threads Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#508 · 2 comments · 2 reactions · Opened Oct 28, 2022
unable to perform operation on <WriteUnixTransport closed=True reading=False 0x7f16825f8ba0 Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MagicStack/uvloop#506 · 3 comments · Opened Sep 28, 2022
OSError: [Errno 6] No such device or address: '/proc/self/fd/1' when using asyncio.create_subprocess_* Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

MagicStack/uvloop#505 · 1 comment · 2 reactions · Opened Sep 22, 2022
Loop.call_later(0) and Loop.call_later(-1) return a uvloop.loop.Handle and not an asyncio.TimerHandle Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

MagicStack/uvloop#482 · 2 comments · Opened Jul 20, 2022
`_SSLProtocolTransport.close()` cannot close the connection until timeout or EOF Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#471 · 28 comments · Opened May 21, 2022
Missing asyncio feature regarding support of SCTP sockets Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

MagicStack/uvloop#467 · Opened May 11, 2022
uvloop closes underlying sockets that were established outside upon end of asyncio.run() Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

MagicStack/uvloop#464 · 1 comment · Opened Mar 22, 2022
Test failures on macOS due to `OSError: AF_UNIX path too long` Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

MagicStack/uvloop#463 · 2 comments · Opened Feb 24, 2022
No module named 'uvloop.loop' Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MagicStack/uvloop#462 · 3 comments · Opened Feb 22, 2022
Question: does uvloop set stdout to non-blocking? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

MagicStack/uvloop#460 · 1 comment · 2 reactions · Opened Jan 14, 2022
Empty output when calling Snap command Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

MagicStack/uvloop#457 · 3 comments · Opened Dec 27, 2021
uvloop not supported in AWS Lambda Arm architecture Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

MagicStack/uvloop#451 · 2 comments · 1 reaction · Opened Nov 19, 2021

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