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, 11 insertions, 0 deletions

diff --git a/lib/sqlalchemy/util/langhelpers.py b/lib/sqlalchemy/util/langhelpers.py
index 457d2875d..eb582b528 100644
--- a/lib/sqlalchemy/util/langhelpers.py
+++ b/lib/sqlalchemy/util/langhelpers.py
@@ -1879,3 +1879,14 @@ def repr_tuple_names(names):
         return ", ".join(res)
     else:
         return "%s, ..., %s" % (", ".join(res[0:3]), res[-1])
+
+
+def has_compiled_ext():
+    try:
+        from sqlalchemy import cimmutabledict  # noqa F401
+        from sqlalchemy import cprocessors  # noqa F401
+        from sqlalchemy import cresultproxy  # noqa F401
+
+        return True
+    except ImportError:
+        return False