diff --git a/Week04/decorators_kerimcan_dede.py b/Week04/decorators_kerimcan_dede.py
new file mode 100644
index 00000000..e6cee147
--- /dev/null
+++ b/Week04/decorators_kerimcan_dede.py
@@ -0,0 +1,31 @@
+import time
+import tracemalloc
+
+def performance(func):
+
+    def wrapper(*args, **kwargs):
+        
+        tracemalloc.start()
+        start = time.perf_counter()
+        start_mem = tracemalloc.get_traced_memory()[0]
+        tracemalloc.reset_peak()
+
+        try:
+            result = func(*args, **kwargs)
+        
+        finally:
+            end = time.perf_counter()
+            current, peak = tracemalloc.get_traced_memory()
+            
+            performance.counter += 1
+            performance.total_time += end - start
+            performance.total_mem += peak - start_mem
+            
+            tracemalloc.stop()
+
+        return result
+    return wrapper
+
+performance.counter = 0
+performance.total_time = 0
+performance.total_mem = 0