diff --git a/Week04/decorators_muhammet_topcu.py b/Week04/decorators_muhammet_topcu.py
new file mode 100644
index 00000000..683cafba
--- /dev/null
+++ b/Week04/decorators_muhammet_topcu.py
@@ -0,0 +1,24 @@
+import time
+import sys
+
+def performance(func):
+    def wrapper(*args, **kwargs):
+        start = time.time()
+        result = func(*args, **kwargs)
+        end = time.time()
+
+        performance.counter += 1
+        performance.total_time += end - start
+
+        try:
+            performance.total_mem += sys.getsizeof(result)
+        except Exception:
+            pass
+
+        return result
+
+    return wrapper
+
+performance.counter = 0
+performance.total_time = 0.0
+performance.total_mem = 0