diff --git a/Week04/decorators_mehmet_mert_yigit.py b/Week04/decorators_mehmet_mert_yigit.py
new file mode 100644
index 00000000..52656800
--- /dev/null
+++ b/Week04/decorators_mehmet_mert_yigit.py
@@ -0,0 +1,31 @@
+import time
+import tracemalloc
+from functools import wraps
+
+
+def performance(func):
+    @wraps(func)
+    def wrapper(*args, **kwargs):
+        performance.counter += 1
+
+        tracemalloc.start()
+        start_time = time.perf_counter()
+
+        try:
+            result = func(*args, **kwargs)
+            return result
+        finally:
+            end_time = time.perf_counter()
+            current, peak = tracemalloc.get_traced_memory()
+
+            performance.total_time += end_time - start_time
+            performance.total_mem += peak
+
+            tracemalloc.stop()
+
+    return wrapper
+
+
+performance.counter = 0
+performance.total_time = 0.0
+performance.total_mem = 0