diff --git a/Week04/decorators_aysegul_ezber.py b/Week04/decorators_aysegul_ezber.py
new file mode 100644
index 00000000..aa5dfe6d
--- /dev/null
+++ b/Week04/decorators_aysegul_ezber.py
@@ -0,0 +1,24 @@
+import time
+import tracemalloc
+
+def performance(func):
+    
+    setattr(performance, 'counter', 0)
+    setattr(performance, 'total_time', 0.0)
+    setattr(performance, 'total_mem', 0.0)
+    
+    def inner(*args, **kwargs):
+        tracemalloc.start()
+        start_time = time.time()
+        result = func(*args, **kwargs)
+        end_time = time.time()
+        current, peak = tracemalloc.get_traced_memory()
+        tracemalloc.stop()
+        
+        setattr(performance, 'counter', getattr(performance, 'counter') + 1)
+        setattr(performance, 'total_time', getattr(performance, 'total_time') + (end_time - start_time))
+        setattr(performance, 'total_mem', getattr(performance, 'total_mem') + peak)
+        
+        return result
+    
+    return inner