diff --git a/Week03/decorators_yavuz_selim_erdogan.py b/Week03/decorators_yavuz_selim_erdogan.py
new file mode 100644
index 00000000..f87e9b4c
--- /dev/null
+++ b/Week03/decorators_yavuz_selim_erdogan.py
@@ -0,0 +1,27 @@
+import time
+import tracemalloc
+
+
+def performance(function):
+    def wrapper(*args, **kwargs):
+        if not hasattr(performance, "counter"):
+            performance.counter = 0
+        if not hasattr(performance, "total_time"):
+            performance.total_time = 0
+        if not hasattr(performance, "total_mem"):
+            performance.total_mem = 0
+
+        tracemalloc.start()
+        start_time = time.perf_counter()
+        start_mem = tracemalloc.get_traced_memory()[1]
+        function(*args, **kwargs)
+        end_time = time.perf_counter()
+        end_mem = tracemalloc.get_traced_memory()[1]
+
+        performance.counter += 1
+        performance.total_time += end_time - start_time
+        performance.total_mem += end_mem - start_mem
+
+        return function
+
+    return wrapper