diff --git a/Week04/decorators_alisher_shalenov.py b/Week04/decorators_alisher_shalenov.py
new file mode 100644
index 00000000..af105b1f
--- /dev/null
+++ b/Week04/decorators_alisher_shalenov.py
@@ -0,0 +1,27 @@
+import time
+import tracemalloc
+
+def performance(fn):
+    if not hasattr(performance, "counter"):
+        performance.counter = 0
+        performance.total_time = 0
+        performance.total_mem = 0
+
+    def wrapper(*args, **kwargs):
+        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_time += (end_time - start_time)
+        performance.total_mem += peak
+
+        return result
+
+    return wrapper