diff --git a/Week03/decorators_ata_ceyhun_alaca.py b/Week03/decorators_ata_ceyhun_alaca.py
new file mode 100644
index 00000000..12b850ac
--- /dev/null
+++ b/Week03/decorators_ata_ceyhun_alaca.py
@@ -0,0 +1,28 @@
+import time
+import tracemalloc
+
+
+def performance(func):
+    """
+    :param func:
+    :return: A decorated function that measures performance.
+    """
+    if not hasattr(performance, "counter"):
+        performance.counter = 0
+        performance.total_time = 0
+        performance.total_mem = 0
+
+    def decorated_function(*args, **kwargs):
+        start_time = time.perf_counter()
+        performance.counter += 1
+
+        tracemalloc.start()
+        result = func(*args, **kwargs)
+        end_time = time.perf_counter()
+        
+        performance.total_mem += tracemalloc.get_traced_memory()[1]
+        tracemalloc.stop()
+        performance.total_time += (end_time - start_time)
+        return result
+
+    return decorated_function