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gh-128002: add what's new docs for asyncio by kumaraditya303 · Pull Request #134324 · python/cpython · GitHub

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gh-128002: add what's new docs for asyncio #134324

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kumaraditya303 merged 2 commits into from
May 20, 2025
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gh-128002: add what's new docs for asyncio #134324

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add whatsnew docs
kumaraditya303 May 20, 2025
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hugovk May 20, 2025
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15 changes: 11 additions & 4 deletions Doc/whatsnew/3.14.rst
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Expand Up @@ -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`.
Expand Down Expand Up @@ -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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