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bpo-41718: Update runpy startup time What's New #24998

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7 changes: 4 additions & 3 deletions Doc/whatsnew/3.10.rst
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Expand Up @@ -922,9 +922,10 @@ Optimizations
(Contributed by Serhiy Storchaka in :issue:`41334`.)

* The :mod:`runpy` module now imports fewer modules.
The ``python3 -m module-name`` command startup time is 1.3x faster in
average.
(Contributed by Victor Stinner in :issue:`41006`.)
The ``python3 -m module-name`` command startup time is 1.4x faster in
average. On Linux, ``python3 -I -m module-name`` imports 69 modules on Python
3.9, whereas it only imports 51 modules (-18) on Python 3.10.
(Contributed by Victor Stinner in :issue:`41006` and :issue:`41718`.)

* The ``LOAD_ATTR`` instruction now uses new "per opcode cache" mechanism. It
is about 36% faster now for regular attributes and 44% faster for slots.
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