diff --git a/Week04/decorators_ayseselin_kargi.py b/Week04/decorators_ayseselin_kargi.py
new file mode 100644
index 00000000..2f5bdd2c
--- /dev/null
+++ b/Week04/decorators_ayseselin_kargi.py
@@ -0,0 +1,30 @@
+import time
+import tracemalloc
+
+def performance(fn):
+    counter = 0
+    total_time = 0.0
+    total_mem = 0
+
+    def wrapper(*args, **kwargs):
+        nonlocal counter, total_time, total_mem
+
+        counter += 1
+
+        tracemalloc.start()
+        start = time.perf_counter()
+
+        result = fn(*args, **kwargs)
+
+        end = time.perf_counter()
+        current, peak = tracemalloc.get_traced_memory()
+        tracemalloc.stop()
+
+        total_time += (end - start)
+        total_mem += peak
+
+        return result
+
+    wrapper.get_stats = lambda: (counter, total_time, total_mem)
+
+    return wrapper