gh-141968: Use take_byes in re._compiler

cmaloney · cmaloney · commit c2a0b524d7bf · 2025-11-26T14:20:19.000-08:00
Removes a copy going from bytearray to bytes.
diff --git a/Lib/re/_compiler.py b/Lib/re/_compiler.py
@@ -375,7 +375,7 @@ def _optimize_charset(charset, iscased=None, fixup=None, fixes=None):
     # less significant byte is a bit index in the chunk (just like the
     # CHARSET matching).
 
-    charmap = bytes(charmap) # should be hashable
+    charmap = charmap.take_bytes() # should be hashable
     comps = {}
     mapping = bytearray(256)
     block = 0
diff --git a/Misc/NEWS.d/next/Library/2025-11-26-14-20-10.gh-issue-141968.W139Pv.rst b/Misc/NEWS.d/next/Library/2025-11-26-14-20-10.gh-issue-141968.W139Pv.rst
@@ -0,0 +1,2 @@
+Remove data copy from :mod:`re` compilation of regexes with large charsets
+by using :func:`bytearray.take_byes`.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	+Remove data copy from :mod:`re` compilation of regexes with large charsets
	`2`	+by using :func:`bytearray.take_byes`.