diff --git a/tests/timeit/31.class.dynamic.attributes.py b/tests/timeit/31.class.dynamic.attributes.py
new file mode 100755
index 00000000..35afe370
--- /dev/null
+++ b/tests/timeit/31.class.dynamic.attributes.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+
+# MIT License
+#
+# Copyright (c) 2025 Eugenio Parodi <ceccopierangiolieugenio AT googlemail DOT com>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+from dataclasses import dataclass
+import timeit
+
+@dataclass
+class Data():
+    a:int
+    b:str
+
+class A():
+    p1 = Data(1,'a')
+    p2 = Data(2,'b')
+    p3 = Data(3,'c')
+    p4 = Data(4,'d')
+    p5 = Data(5,'e')
+
+class B():
+    p1:Data
+    p2:Data
+    p3:Data
+    p4:Data
+    p5:Data
+
+B.p1 = Data(1,'a')
+B.p2 = Data(2,'b')
+B.p3 = Data(3,'c')
+B.p4 = Data(4,'d')
+B.p5 = Data(5,'e')
+
+def test_ti_01():
+    return len([A.p1.b, A.p1.a, A.p2.b, A.p2.a, A.p3.b, A.p3.a, A.p4.b, A.p4.a, A.p5.b, A.p5.a])
+def test_ti_02():
+    return len([B.p1.b, B.p1.a, B.p2.b, B.p2.a, B.p3.b, B.p3.a, B.p4.b, B.p4.a, B.p5.b, B.p5.a])
+def test_ti_03():
+    return len([A.p1.b, A.p1.a, A.p2.b, A.p2.a, A.p3.b, A.p3.a, A.p4.b, A.p4.a, A.p5.b, A.p5.a])
+def test_ti_04():
+    return len([B.p1.b, B.p1.a, B.p2.b, B.p2.a, B.p3.b, B.p3.a, B.p4.b, B.p4.a, B.p5.b, B.p5.a])
+def test_ti_05():
+    return len([A.p1.b, A.p1.a, A.p2.b, A.p2.a, A.p3.b, A.p3.a, A.p4.b, A.p4.a, A.p5.b, A.p5.a])
+def test_ti_06():
+    return len([B.p1.b, B.p1.a, B.p2.b, B.p2.a, B.p3.b, B.p3.a, B.p4.b, B.p4.a, B.p5.b, B.p5.a])
+
+loop = 10000
+
+a:dict = {}
+
+for testName in sorted([tn for tn in globals() if tn.startswith('test_ti_')]):
+    result = timeit.timeit(f'{testName}(*a)', globals=globals(), number=loop)
+    # print(f"test{iii}) fps {loop / result :.3f} - s {result / loop:.10f} - {result / loop} {globals()[testName](*a)}")
+    print(f"{testName} | {result / loop:.10f} sec. | {loop / result : 15.3f} Fps ╞╡-> {globals()[testName](*a)}")
diff --git a/tests/timeit/32.enum.vs.flag.vs.bitmap.py b/tests/timeit/32.enum.vs.flag.vs.bitmap.py
new file mode 100755
index 00000000..34e17508
--- /dev/null
+++ b/tests/timeit/32.enum.vs.flag.vs.bitmap.py
@@ -0,0 +1,127 @@
+#!/usr/bin/env python3
+
+# MIT License
+#
+# Copyright (c) 2025 Eugenio Parodi <ceccopierangiolieugenio AT googlemail DOT com>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from enum import Enum,Flag,auto
+import timeit
+
+class PermBm(int):
+    READ = 0x01
+    WRITE = 0x02
+    EXECUTE = 0x04
+
+class PermEn(Enum):
+    READ = 0x01
+    WRITE = 0x02
+    EXECUTE = 0x04
+
+class PermFl(Flag):
+    READ = auto()
+    WRITE = auto()
+    EXECUTE = auto()
+
+class PermCFl():
+    READ:PermCFl
+    WRITE:PermCFl
+    EXECUTE:PermCFl
+    __slots__= ('_v')
+    _v:int
+    def __init__(self,v:int):
+        self._v = v
+    def __or__(self, other:PermCFl):
+        return PermCFl(self._v|other._v)
+    def __and__(self, other:PermCFl):
+        return PermCFl(self._v&other._v)
+    def __str__(self):
+        return f"PermCFL({self._v})"
+PermCFl.READ = PermCFl(0x01)
+PermCFl.WRITE = PermCFl(0x02)
+PermCFl.EXECUTE = PermCFl(0x04)
+
+fff = PermFl.READ | PermFl.WRITE
+
+print(fff)
+
+def test_ti_0_01():
+    f1 = PermFl.READ  | PermFl.WRITE
+    f2 = PermFl.READ  | PermFl.EXECUTE
+    f3 = PermFl.WRITE | PermFl.EXECUTE
+    return f1 | f2 | f3
+def test_ti_0_02():
+    f1 = PermCFl.READ  | PermCFl.WRITE
+    f2 = PermCFl.READ  | PermCFl.EXECUTE
+    f3 = PermCFl.WRITE | PermCFl.EXECUTE
+    return f1 | f2 | f3
+def test_ti_0_03():
+    f1 = PermBm.READ  | PermBm.WRITE
+    f2 = PermBm.READ  | PermBm.EXECUTE
+    f3 = PermBm.WRITE | PermBm.EXECUTE
+    return f1 | f2 | f3
+def test_ti_1_01():
+    f1 = PermFl.READ  | PermFl.WRITE
+    f2 = PermFl.READ  | PermFl.EXECUTE
+    f3 = PermFl.WRITE | PermFl.EXECUTE
+    return 123
+def test_ti_1_02():
+    f1 = PermCFl.READ  | PermCFl.WRITE
+    f2 = PermCFl.READ  | PermCFl.EXECUTE
+    f3 = PermCFl.WRITE | PermCFl.EXECUTE
+    return 123
+def test_ti_1_03():
+    f1 = PermBm.READ  | PermBm.WRITE
+    f2 = PermBm.READ  | PermBm.EXECUTE
+    f3 = PermBm.WRITE | PermBm.EXECUTE
+    return 123
+def test_ti_2_03():
+    f1 = PermEn.READ
+    f2 = PermEn.READ
+    f3 = PermEn.WRITE
+    return f1 , f2 , f3
+def test_ti_2_04():
+    f1 = PermFl.READ
+    f2 = PermFl.READ
+    f3 = PermFl.WRITE
+    return f1 , f2 , f3
+def test_ti_2_05():
+    f1 = PermCFl.READ
+    f2 = PermCFl.READ
+    f3 = PermCFl.WRITE
+    return f1 , f2 , f3
+def test_ti_2_06():
+    f1 = PermBm.READ
+    f2 = PermBm.READ
+    f3 = PermBm.WRITE
+    return f1 , f2 , f3
+
+
+loop = 100000
+
+a:dict = {}
+
+for testName in sorted([tn for tn in globals() if tn.startswith('test_ti_')]):
+    result = timeit.timeit(f'{testName}(*a)', globals=globals(), number=loop)
+    # print(f"test{iii}) fps {loop / result :.3f} - s {result / loop:.10f} - {result / loop} {globals()[testName](*a)}")
+    print(f"{testName} | {result / loop:.10f} sec. | {loop / result : 15.3f} Fps ╞╡-> {globals()[testName](*a)}")