GH-117841: Speed up pathlib.Path.glob() on Windows by using lexists()

Lib/glob.py

@@ -339,7 +339,7 @@ def __init__(self, sep, case_sensitive, case_pedantic=False, recursive=False):
 
     # Low-level methods
 
-    lstat = staticmethod(os.lstat)
+    lexists = staticmethod(os.path.lexists)
     scandir = staticmethod(os.scandir)
     parse_entry = operator.attrgetter('path')
     concat_path = operator.add
@@ -510,14 +510,10 @@ def select_exists(self, path, exists=False):
         """
         if exists:
             # Optimization: this path is already known to exist, e.g. because
-            # it was returned from os.scandir(), so we skip calling lstat().
+            # it was returned from os.scandir(), so we skip calling lexists().
+            yield path
+        elif self.lexists(path):
             yield path
-        else:
-            try:
-                self.lstat(path)
-                yield path
-            except OSError:
-                pass
 
     @classmethod
     def walk(cls, root, top_down, on_error, follow_symlinks):

Lib/pathlib/_abc.py

@@ -44,9 +44,17 @@ def _is_case_sensitive(parser):
 
 
 class Globber(glob._Globber):
-    lstat = operator.methodcaller('lstat')
     add_slash = operator.methodcaller('joinpath', '')
 
+    @staticmethod
+    def lexists(path):
+        # Emulate os.path.lexists(), which never raises OSError.
+        try:
+            path.stat(follow_symlinks=False)
+        except (OSError, ValueError):
+            return False
+        return True
+
     @staticmethod
     def scandir(path):
         # Emulate os.scandir(), which returns an object that can be used as a

Misc/NEWS.d/next/Library/2024-04-13-22-23-48.gh-issue-117842.ZGoQqd.rst

@@ -0,0 +1,2 @@
+Speed up :meth:`pathlib.Path.glob` on Windows by using fast implementation
+of :func:`os.path.lexists`.