Replace c extension with cython versions.workflow_test_cython

Re-implement c version immutabledict / processors / resultproxy / utils with cython.
Performance is in general in par or better than the c version
Added a collection module that has cython version of OrderedSet and IdentitySet

Added a new test/perf file to compare the implementations.
Run ``python test/perf/compiled_extensions.py all`` to execute the comparison test.

See results here: https://docs.google.com/document/d/1nOcDGojHRtXEkuy4vNXcW_XOJd9gqKhSeALGG3kYr6A/edit?usp=sharing

Fixes: #7256
Change-Id: I2930ef1894b5048210384728118e586e813f6a76
Signed-off-by: Federico Caselli <cfederico87@gmail.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/test/base/test_result.py b/test/base/test_result.py
index 8c9eb398e..b31e886da 100644
--- a/test/base/test_result.py
+++ b/test/base/test_result.py
@@ -195,6 +195,37 @@ class ResultTupleTest(fixtures.TestBase):
             eq_(kt._fields, ("a", "b"))
             eq_(kt._asdict(), {"a": 1, "b": 3})
 
+    @testing.requires.cextensions
+    def test_serialize_cy_py_cy(self):
+        from sqlalchemy.engine._py_row import BaseRow as _PyRow
+        from sqlalchemy.cyextension.resultproxy import BaseRow as _CyRow
+
+        global Row
+
+        p = result.SimpleResultMetaData(["a", None, "b"])
+
+        for loads, dumps in picklers():
+
+            class Row(_CyRow):
+                pass
+
+            row = Row(p, p._processors, p._keymap, 0, (1, 2, 3))
+
+            state = dumps(row)
+
+            class Row(_PyRow):
+                pass
+
+            row2 = loads(state)
+            is_true(isinstance(row2, _PyRow))
+            state2 = dumps(row2)
+
+            class Row(_CyRow):
+                pass
+
+            row3 = loads(state2)
+            is_true(isinstance(row3, _CyRow))
+
 
 class ResultTest(fixtures.TestBase):
     def _fixture(