diff --git a/Week04/decorators_turhan_gunduzoglu.py b/Week04/decorators_turhan_gunduzoglu.py
new file mode 100644
index 00000000..425c5803
--- /dev/null
+++ b/Week04/decorators_turhan_gunduzoglu.py
@@ -0,0 +1,40 @@
+import time
+import tracemalloc
+from functools import wraps
+
+def performance(func):
+    counter = 0
+    total_time = 0
+    total_mem = 0
+
+    @wraps(func)
+    def wrapper(*args, **kwargs):
+        nonlocal counter, total_time, total_mem
+
+        counter += 1
+
+        tracemalloc.start()
+        start_time = time.perf_counter()
+
+        result = func(*args, **kwargs)
+
+        end_time = time.perf_counter()
+        elapsed_time = end_time - start_time
+
+        current, peak = tracemalloc.get_traced_memory()
+        tracemalloc.stop()
+
+        total_time += elapsed_time
+        total_mem += peak
+
+        wrapper.counter = counter
+        wrapper.total_time = total_time
+        wrapper.total_mem = total_mem
+
+        return result
+
+    wrapper.counter = 0
+    wrapper.total_time = 0
+    wrapper.total_mem = 0
+
+    return wrapper