Undo change to joinpath(), fix news blurb.

barneygale · Jan 27, 2023 · Feb 4, 2023 · Feb 4, 2023 · Feb 4, 2023 · Feb 4, 2023
commit 97995bd2c3ea3c31bb420fab61d55b4ff0332bd0
diff --git a/Lib/pathlib.py b/Lib/pathlib.py
@@ -585,7 +585,22 @@ def joinpath(self, *args):
         paths) or a totally different path (if one of the arguments is
         anchored).
         """
-        return self._from_parts((self,) + args)
+        drv1, root1, parts1 = self._drv, self._root, self._parts
+        drv2, root2, parts2 = self._parse_parts(args)
+        if root2:
+            if not drv2 and drv1:
+                return self._from_parsed_parts(drv1, root2, [drv1 + root2] + parts2[1:])
+            else:
+                return self._from_parsed_parts(drv2, root2, parts2)
+        elif drv2:
+            if drv2 == drv1 or self._flavour.normcase(drv2) == self._flavour.normcase(drv1):
+                # Same drive => second path is relative to the first.
+                return self._from_parsed_parts(drv1, root1, parts1 + parts2[1:])
+            else:
+                return self._from_parsed_parts(drv2, root2, parts2)
+        else:
+            # Second path is non-anchored (common case).
+            return self._from_parsed_parts(drv1, root1, parts1 + parts2)
 
     def __truediv__(self, key):
         try:

diff --git a/Misc/NEWS.d/next/Library/2023-02-04-17-47-08.gh-issue-101362.uZjk9-.rst b/Misc/NEWS.d/next/Library/2023-02-04-17-47-08.gh-issue-101362.uZjk9-.rst
@@ -1,3 +1,2 @@
-Speed up construction and joining of :class:`pathlib.PurePath` objects by
-deferring path parsing and normalization until needed. Some path object
-operations are 2-4x faster as a result of this change.
+Speed up construction of :class:`pathlib.PurePath` objects by deferring
+path parsing and normalization.