diff --git a/Week04/decorators_sergen_maksutlar.py b/Week04/decorators_sergen_maksutlar.py
new file mode 100644
index 00000000..3260b014
--- /dev/null
+++ b/Week04/decorators_sergen_maksutlar.py
@@ -0,0 +1,26 @@
+import time
+import tracemalloc
+
+def performance(f):
+    if not hasattr(performance, "counter"):
+        performance.counter = 0
+        
+    if not hasattr(performance, "total_time"):
+        performance.total_time = 0.0
+        
+    if not hasattr(performance, "total_mem"):
+        performance.total_mem = 0
+        
+    def _performance(*args, **kwargs):
+        performance.counter += 1 
+        
+        tracemalloc.start()
+        
+        x = time.time()
+        
+        ret = f(*args, **kwargs)
+        performance.total_time += time.time() - x
+        performance.total_mem = tracemalloc.get_traced_memory()[1]
+        tracemalloc.stop()
+        return ret
+    return _performance