diff --git a/Week04/decorators_ufuk_dilek.py b/Week04/decorators_ufuk_dilek.py
new file mode 100644
index 00000000..f514b531
--- /dev/null
+++ b/Week04/decorators_ufuk_dilek.py
@@ -0,0 +1,21 @@
+import time
+import tracemalloc
+
+
+def performance(func):
+    performance.counter = 0
+    performance.total_time = 0
+    performance.total_mem = 0
+
+    def wrapper(*args, **kwargs):
+        tracemalloc.start()
+        time1 = time.time()
+        result = func(*args, **kwargs)
+        time2 = time.time()
+        current, peak = tracemalloc.get_traced_memory()
+        tracemalloc.stop()
+        performance.counter += 1
+        performance.total_time += time2 - time1
+        performance.total_mem += peak
+        return result
+    return wrapper