Minor optimization to the code

* remove the c version of distill params since it's actually slower than
the python one
* add a function to langhelpers to check if the cextensions are active
* minor cleanup to the OrderedSet implementation

Change-Id: Iec3d0c3f0f42cdf51f802aaca342ba37b8783b85

1 files changed, 1 insertions, 9 deletions

diff --git a/lib/sqlalchemy/testing/requirements.py b/lib/sqlalchemy/testing/requirements.py
index d8da9c818..f16ba326c 100644
--- a/lib/sqlalchemy/testing/requirements.py
+++ b/lib/sqlalchemy/testing/requirements.py
@@ -1258,7 +1258,7 @@ class SuiteRequirements(Requirements):
     @property
     def cextensions(self):
         return exclusions.skip_if(
-            lambda: not self._has_cextensions(), "C extensions not installed"
+            lambda: not util.has_compiled_ext(), "C extensions not installed"
         )
 
     def _has_sqlite(self):
@@ -1270,14 +1270,6 @@ class SuiteRequirements(Requirements):
         except ImportError:
             return False
 
-    def _has_cextensions(self):
-        try:
-            from sqlalchemy import cresultproxy, cprocessors  # noqa
-
-            return True
-        except ImportError:
-            return False
-
     @property
     def async_dialect(self):
         """dialect makes use of await_() to invoke operations on the DBAPI."""