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PyPI · #3313 most downloaded on PyPI
HTTP/2 State-Machine based protocol implementation
Last release 13 days ago
21 Sep 2026
Release timing varies
gaps range from 8 days to 6 months
Nearly every release is documented
notes for 15 of 15 stable releases
1 version withdrawn
withdrawn after publishing
2 years old
16 releases · first in 2024
General performance improvement. Up to 5% in typical workloads, especially with CPython 3.11+
Fixed quadratic copying in FrameBuffer when parsing multiple coalesced HTTP/2 frames, substantially improving large DATA-buffer throughput in both pur
FrameBuffer when parsing multiple coalescedOne column per month.
no user facing changes.
Fixed RFC conformance (7540 6.9.2) mandates that the connection-level flow-control window always starts at 65535 octets, regardless of what SETTINGS_I
Fixed edge-case "rust panic" when receiving malformed (ie. invalid utf-8 header values).
5.0.10 (2025-10-05) (rust) Upgrade pyo3 to 0.26.0
Release the GIL during hpack encoding/decoding in the optimized build.
Add PyPy 3.11 pre-built optimized build in CI/CD
No user facing changes. Release made to include win32/linux i686 wheel published to PyPI.
(Rust) Updated pyo3 from 0.23.3 to 0.23.4
(Rust) Updated pyo3 from 0.22.5 to 0.23.3
Added explicit support for Python 3.13
Added method has_update into Settings class.
has_update into Settings class.Fixed URLs in project metadata.
Fixed a minor performance regression in _build_headers_frames method.
_build_headers_frames method.Support for Python 3.6 has been dropped.
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