gh-141968: Use `take_bytes` to remove copy in `_pyio.BytesIO.read()` (#149850)

diff --git a/Lib/_pyio.py b/Lib/_pyio.py
index 1b5b75ef566a32b01719a97076a1d67aceb10f19..9c7faa26bb4bd44f78b4ba5faea3105af1df1862 100644 (file)
--- a/Lib/_pyio.py
+++ b/Lib/_pyio.py
@@ -941,7 +941,7 @@ class BytesIO(BufferedIOBase):
             newpos = min(len(self._buffer), self._pos + size)
             b = self._buffer[self._pos : newpos]
             self._pos = newpos
-            return bytes(b)
+            return b.take_bytes()
 
     def read1(self, size=-1):
         """This is the same as read.