GH-125413: pathlib ABCs: use `scandir()` to speed up `glob()` (#126261)

Use the new `PathBase.scandir()` method in `PathBase.glob()`, which greatly
reduces the number of `PathBase.stat()` calls needed when globbing.

There are no user-facing changes, because the pathlib ABCs are still
private and `Path.glob()` doesn't use the implementation in its superclass.

1 files changed, 1 insertions, 13 deletions

diff --git a/Lib/pathlib/_abc.py b/Lib/pathlib/_abc.py
index dfff8b4..cc7c199 100644
--- a/Lib/pathlib/_abc.py
+++ b/Lib/pathlib/_abc.py
@@ -94,25 +94,13 @@ class PathGlobber(_GlobberBase):
 
     lexists = operator.methodcaller('exists', follow_symlinks=False)
     add_slash = operator.methodcaller('joinpath', '')
-
-    @staticmethod
-    def scandir(path):
-        """Emulates os.scandir(), which returns an object that can be used as
-        a context manager. This method is called by walk() and glob().
-        """
-        import contextlib
-        return contextlib.nullcontext(path.iterdir())
+    scandir = operator.methodcaller('scandir')
 
     @staticmethod
     def concat_path(path, text):
         """Appends text to the given path."""
         return path.with_segments(path._raw_path + text)
 
-    @staticmethod
-    def parse_entry(entry):
-        """Returns the path of an entry yielded from scandir()."""
-        return entry
-
 
 class PurePathBase:
     """Base class for pure path objects.