diff --git a/Week04/decorators_ahmet_hakan_yildirim.py b/Week04/decorators_ahmet_hakan_yildirim.py
new file mode 100644
index 00000000..2898bac9
--- /dev/null
+++ b/Week04/decorators_ahmet_hakan_yildirim.py
@@ -0,0 +1,34 @@
+import time
+import tracemalloc
+
+def performance(fn):
+    """Decorator that tracks execution time and memory consumption of a function."""
+    # Initialize tracking attributes if not already present
+    if not hasattr(performance, "counter"):
+        performance.counter = 0
+        performance.total_time = 0
+        performance.total_mem = 0
+    
+    def inner(*args, **kwargs):
+        # Update function invocation count
+        performance.counter += 1
+        
+        # Begin memory and execution time monitoring
+        tracemalloc.start()
+        start = time.time()
+        
+        # Run the original function
+        ret_value = fn(*args, **kwargs)
+        
+        # End monitoring and capture metrics
+        end = time.time()
+        current_usage, max_usage = tracemalloc.get_traced_memory()
+        tracemalloc.stop()
+        
+        # Accumulate memory and execution time
+        performance.total_mem += max_usage
+        performance.total_time += (end - start)
+        
+        return ret_value
+    
+    return inner