diff --git a/unittests/unittests_query/performance_test_case.py b/unittests/unittests_query/performance_test_case.py
index 1741f4e2..bc4af12e 100644
--- a/unittests/unittests_query/performance_test_case.py
+++ b/unittests/unittests_query/performance_test_case.py
@@ -5,8 +5,8 @@ import unittest
 from cpl_query.enumerable import Enumerable
 from cpl_query.iterable import Iterable
 
-VALUES = 10000
-COUNT = 50
+VALUES = 1000
+COUNT = 75
 
 
 class PerformanceTestCase(unittest.TestCase):
@@ -24,9 +24,9 @@ class PerformanceTestCase(unittest.TestCase):
         iterable = timeit.timeit(lambda: Iterable(int, self.values), number=COUNT)
 
         print('Range')
-        print(f'd: {default}')
-        print(f'i: {iterable}')
-        print(f'e: {enumerable}')
+        print(f'd: {default}s')
+        print(f'i: {iterable}s')
+        print(f'e: {enumerable}s')
 
         self.assertLess(default, enumerable)
         self.assertLess(default, iterable)
@@ -37,9 +37,32 @@ class PerformanceTestCase(unittest.TestCase):
         enumerable = timeit.timeit(lambda: Enumerable(int, self.values).where(lambda x: x == 50).single(), number=COUNT)
 
         print('Where single')
-        print(f'd: {default}')
-        print(f'i: {iterable}')
-        print(f'e: {enumerable}')
+        print(f'd: {default}s')
+        print(f'i: {iterable}s')
+        print(f'e: {enumerable}s')
+
+        self.assertLess(default, enumerable)
+        self.assertLess(default, iterable)
+
+    def test_where_single_complex(self):
+        class TestModel:
+
+            def __init__(self, v, tm=None):
+                self.value = v
+                self.tm = tm
+
+        values = []
+        for i in range(VALUES):
+            values.append(TestModel(i, TestModel(i + 1)))
+
+        default = timeit.timeit(lambda: [x for x in list(values) if x.tm.value == 50], number=COUNT)
+        iterable = timeit.timeit(lambda: Iterable(TestModel, values).where(lambda x: x.tm.value == 50).single(), number=COUNT)
+        enumerable = timeit.timeit(lambda: Enumerable(TestModel, values).where(lambda x: x.tm.value == 50).single(), number=COUNT)
+
+        print('Complex where single')
+        print(f'd: {default}s')
+        print(f'i: {iterable}s')
+        print(f'e: {enumerable}s')
 
         self.assertLess(default, enumerable)
         self.assertLess(default, iterable)