diff --git a/Week04/decorators_beyza_saridas.py b/Week04/decorators_beyza_saridas.py
new file mode 100644
index 00000000..6a3b10f9
--- /dev/null
+++ b/Week04/decorators_beyza_saridas.py
@@ -0,0 +1,28 @@
+import time
+import tracemalloc
+
+def performance(fn):
+    def _performance(*args, **kwargs):
+        # If the 'performance' function has not been called before, initialize static variables
+        if not hasattr(performance, "counter"):
+            setattr(performance, "counter", 0)
+            setattr(performance, "total_time", 0)
+            setattr(performance, "total_mem", 0)
+        
+        performance.counter += 1
+
+        tracemalloc.start()
+        start_time = time.time()
+        
+        result = fn(*args, **kwargs)
+        
+        end_time = time.time()
+        current, peak = tracemalloc.get_traced_memory()
+        tracemalloc.stop()
+      
+        performance.total_mem += peak
+        performance.total_time += (end_time - start_time)
+      
+        return result
+
+    return _performance