diff --git a/Week03/decorators_havva_beste_tekceli.py b/Week03/decorators_havva_beste_tekceli.py
new file mode 100644
index 00000000..0d14e230
--- /dev/null
+++ b/Week03/decorators_havva_beste_tekceli.py
@@ -0,0 +1,22 @@
+import time
+import tracemalloc
+
+def performance(function):
+    def _performance(*args, **kwargs):
+        if not hasattr(performance, "counter"):
+            performance.counter = 0
+            performance.total_time = 0
+            performance.total_mem = 0
+
+        tracemalloc.start()
+        start_time = time.perf_counter()
+        function(*args, **kwargs)
+        end_time = time.perf_counter()
+        mem_used = tracemalloc.get_traced_memory()[1]
+        tracemalloc.stop()
+
+        performance.counter += 1
+        performance.total_time += end_time - start_time
+        performance.total_mem += mem_used
+        return function
+    return _performance