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Feb 28, 2021
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bpo-41972: Add whatsnew note for GH-22904 #24672

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5 changes: 5 additions & 0 deletions Doc/whatsnew/3.10.rst
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Expand Up @@ -615,6 +615,11 @@ Optimizations
bytecode level. It is now around 100% faster to create a function with parameter
annotations. (Contributed by Yurii Karabas and Inada Naoki in :issue:`42202`)

* Substring search functions such as ``str1 in str2`` and ``str2.find(str1)``
now sometimes use Crochemore & Perrin's "Two-Way" string searching
algorithm to avoid quadratic behavior on long strings. (Contributed
by Dennis Sweeney in :issue:`41972`)

Deprecated
==========

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