fix 20ms startup penalty added by virtualenv (#2317)

1 files changed, 4 insertions, 4 deletions

diff --git a/src/virtualenv/create/via_global_ref/_virtualenv.py b/src/virtualenv/create/via_global_ref/_virtualenv.py
index da98b82..6c51ca0 100644
--- a/src/virtualenv/create/via_global_ref/_virtualenv.py
+++ b/src/virtualenv/create/via_global_ref/_virtualenv.py
@@ -37,11 +37,8 @@ def patch_dist(dist):
 _DISTUTILS_PATCH = "distutils.dist", "setuptools.dist"
 if sys.version_info > (3, 4):
     # https://docs.python.org/3/library/importlib.html#setting-up-an-importer
-    from functools import partial
-    from importlib.abc import MetaPathFinder
-    from importlib.util import find_spec
 
-    class _Finder(MetaPathFinder):
+    class _Finder:
         """A meta path finder that allows patching the imported distutils modules"""
 
         fullname = None
@@ -65,6 +62,9 @@ if sys.version_info > (3, 4):
                     # https://docs.python.org/3/faq/library.html#what-kinds-of-global-value-mutation-are-thread-safe
                     self.lock.append(lock)
 
+                from functools import partial
+                from importlib.util import find_spec
+
                 with self.lock[0]:
                     self.fullname = fullname
                     try: