diff --git a/Week04/decorators_kerem_kurtuldu.py b/Week04/decorators_kerem_kurtuldu.py
new file mode 100644
index 00000000..bbb186ba
--- /dev/null
+++ b/Week04/decorators_kerem_kurtuldu.py
@@ -0,0 +1,36 @@
+import time
+import tracemalloc
+
+def performance(func):
+    setattr(performance, '_count', 0)
+    setattr(performance, '_time', 0.0)
+    setattr(performance, '_memory', 0.0)
+
+    def wrapper(*args, **kwargs):
+        count = getattr(performance, '_count') + 1
+        setattr(performance, '_count', count)
+
+        start = time.time()
+        tracemalloc.start()
+
+        try:
+            func(*args, **kwargs)
+        except Exception as exc:
+            print(f"Error: {exc}")
+        finally:
+            end = time.time()
+            curr, peak = tracemalloc.get_traced_memory()
+            tracemalloc.stop()
+
+            elapsed = end - start
+            total_time = getattr(performance, '_time') + elapsed
+            total_mem = getattr(performance, '_memory') + peak
+
+            setattr(performance, '_time', total_time)
+            setattr(performance, '_memory', total_mem)
+
+            print(f"{func.__name__}: Calls={count}, Time={elapsed:.4f}s, "
+                  f"Memory={peak / 1024:.1f}KB, TotalTime={total_time:.4f}s, "
+                  f"TotalMem={total_mem / 1024:.1f}KB")
+
+    return wrapper