diff --git a/Week04/decorators_feyza_ozdemir.py b/Week04/decorators_feyza_ozdemir.py
new file mode 100644
index 00000000..77e439e8
--- /dev/null
+++ b/Week04/decorators_feyza_ozdemir.py
@@ -0,0 +1,30 @@
+import time
+import tracemalloc
+
+
+def performance(func):
+    """
+    A decorator measuring total call count, execution time, and peak memory usage.
+    """
+    def wrapper(*args, **kwargs):
+        tracemalloc.start()
+        start = time.perf_counter()
+
+        result = func(*args, **kwargs)
+
+        end = time.perf_counter()
+        _, peak = tracemalloc.get_traced_memory()
+        tracemalloc.stop()
+
+        performance.counter += 1
+        performance.total_time += end - start
+        performance.total_mem += peak
+
+        return result
+
+    return wrapper
+
+
+performance.counter = 0
+performance.total_time = 0.0
+performance.total_mem = 0
\ No newline at end of file