Add news entry for asyncio subclass fast path

KRRT7 · KRRT7 · commit 1bdd06d87da8 · 2026-07-10T18:15:11.000-05:00
diff --git a/Misc/NEWS.d/next/Library/2026-07-10-19-05-00.gh-issue-153534.Hk7LmQ.rst b/Misc/NEWS.d/next/Library/2026-07-10-19-05-00.gh-issue-153534.Hk7LmQ.rst
@@ -0,0 +1,4 @@
+Broaden :mod:`_asyncio`'s private ``_call_soon()`` fast path to cover safe
+subclasses of :class:`asyncio.base_events.BaseEventLoop`, improving hot task
+and future scheduling paths without changing customized ``call_soon()``
+behavior.
