diff --git a/NEWS.rst b/NEWS.rst
index 0f1b63a4..f4a37fdf 100644
--- a/NEWS.rst
+++ b/NEWS.rst
@@ -1,3 +1,30 @@
+v8.4.0
+======
+
+Features
+--------
+
+- Deferred import of inspect for import performance. (#499)
+
+
+v8.3.0
+======
+
+Features
+--------
+
+- Disallow passing of 'dist' to EntryPoints.select.
+
+
+v8.2.0
+======
+
+Features
+--------
+
+- Add SimplePath to importlib_metadata.__all__. (#494)
+
+
 v8.1.0
 ======
 
diff --git a/conftest.py b/conftest.py
index 779ac24b..762e66f3 100644
--- a/conftest.py
+++ b/conftest.py
@@ -13,13 +13,18 @@ def pytest_configure():
 
 def remove_importlib_metadata():
     """
-    Because pytest imports importlib_metadata, the coverage
-    reports are broken (#322). So work around the issue by
-    undoing the changes made by pytest's import of
-    importlib_metadata (if any).
+    Ensure importlib_metadata is not imported yet.
+
+    Because pytest or other modules might import
+    importlib_metadata, the coverage reports are broken (#322).
+    Work around the issue by undoing the changes made by a
+    previous import of importlib_metadata (if any).
     """
-    if sys.meta_path[-1].__class__.__name__ == 'MetadataPathFinder':
-        del sys.meta_path[-1]
+    sys.meta_path[:] = [
+        item
+        for item in sys.meta_path
+        if item.__class__.__name__ != 'MetadataPathFinder'
+    ]
     for mod in list(sys.modules):
         if mod.startswith('importlib_metadata'):
             del sys.modules[mod]
diff --git a/importlib_metadata/__init__.py b/importlib_metadata/__init__.py
index b9fc04f1..24587e68 100644
--- a/importlib_metadata/__init__.py
+++ b/importlib_metadata/__init__.py
@@ -8,7 +8,6 @@
 import zipp
 import email
 import types
-import inspect
 import pathlib
 import operator
 import textwrap
@@ -39,6 +38,7 @@
     'DistributionFinder',
     'PackageMetadata',
     'PackageNotFoundError',
+    'SimplePath',
     'distribution',
     'distributions',
     'entry_points',
@@ -226,9 +226,26 @@ def matches(self, **params):
         >>> ep.matches(attr='bong')
         True
         """
+        self._disallow_dist(params)
         attrs = (getattr(self, param) for param in params)
         return all(map(operator.eq, params.values(), attrs))
 
+    @staticmethod
+    def _disallow_dist(params):
+        """
+        Querying by dist is not allowed (dist objects are not comparable).
+        >>> EntryPoint(name='fan', value='fav', group='fag').matches(dist='foo')
+        Traceback (most recent call last):
+        ...
+        ValueError: "dist" is not suitable for matching...
+        """
+        if "dist" in params:
+            raise ValueError(
+                '"dist" is not suitable for matching. '
+                "Instead, use Distribution.entry_points.select() on a "
+                "located distribution."
+            )
+
     def _key(self):
         return self.name, self.value, self.group
 
@@ -372,6 +389,17 @@ def locate_file(self, path: str | os.PathLike[str]) -> SimplePath:
         """
         Given a path to a file in this distribution, return a SimplePath
         to it.
+
+        This method is used by callers of ``Distribution.files()`` to
+        locate files within the distribution. If it's possible for a
+        Distribution to represent files in the distribution as
+        ``SimplePath`` objects, it should implement this method
+        to resolve such objects.
+
+        Some Distribution providers may elect not to resolve SimplePath
+        objects within the distribution by raising a
+        NotImplementedError, but consumers of such a Distribution would
+        be unable to invoke ``Distribution.files()``.
         """
 
     @classmethod
@@ -1077,11 +1105,10 @@ def _get_toplevel_name(name: PackagePath) -> str:
     >>> _get_toplevel_name(PackagePath('foo.dist-info'))
     'foo.dist-info'
     """
-    return _topmost(name) or (
-        # python/typeshed#10328
-        inspect.getmodulename(name)  # type: ignore
-        or str(name)
-    )
+    # Defer import of inspect for performance (python/cpython#118761)
+    import inspect
+
+    return _topmost(name) or (inspect.getmodulename(name) or str(name))
 
 
 def _top_level_inferred(dist):

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