https://github.com/python/cpython/commit/0584533dc70b4efdb65fd53fbb5beddbc7a302a8
commit: 0584533dc70b4efdb65fd53fbb5beddbc7a302a8
branch: main
author: Kumar Aditya <[email protected]>
committer: kumaraditya303 <[email protected]>
date: 2025-05-20T22:11:58+05:30
summary:
gh-128002: add what's new docs for `asyncio` (#134324)
files:
M Doc/whatsnew/3.14.rst
diff --git a/Doc/whatsnew/3.14.rst b/Doc/whatsnew/3.14.rst
index b192615e173f11..604f3365ebffcc 100644
--- a/Doc/whatsnew/3.14.rst
+++ b/Doc/whatsnew/3.14.rst
@@ -1997,11 +1997,19 @@ Optimizations
asyncio
-------
-* :mod:`asyncio` now uses double linked list implementation for native tasks
- which speeds up execution by 10% on standard pyperformance benchmarks and
- reduces memory usage.
+* :mod:`asyncio` has a new per-thread double linked list implementation
internally for
+ :class:`native tasks <asyncio.Task>` which speeds up execution by 10-20% on
standard
+ pyperformance benchmarks and reduces memory usage.
+ This enables external introspection tools such as
+ :ref:`python -m asyncio pstree <whatsnew314-asyncio-introspection>`
+ to introspect the call graph of asyncio tasks running in all threads.
(Contributed by Kumar Aditya in :gh:`107803`.)
+* :mod:`asyncio` has first class support for :term:`free-threading builds
<free threading>`.
+ This enables parallel execution of multiple event loops across different
threads and scales
+ linearly with the number of threads.
+ (Contributed by Kumar Aditya in :gh:`128002`.)
+
* :mod:`asyncio` has new utility functions for introspecting and printing
the program's call graph: :func:`asyncio.capture_call_graph` and
:func:`asyncio.print_call_graph`.
@@ -2083,7 +2091,6 @@ Deprecated
* :class:`asyncio.WindowsProactorEventLoopPolicy`
* :func:`asyncio.get_event_loop_policy`
* :func:`asyncio.set_event_loop_policy`
- * :func:`asyncio.set_event_loop`
Users should use :func:`asyncio.run` or :class:`asyncio.Runner` with
*loop_factory* to use the desired event loop implementation.
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