diff --git a/Week04/decorators_bilal_ayakdas.py b/Week04/decorators_bilal_ayakdas.py
new file mode 100644
index 00000000..9afb84e0
--- /dev/null
+++ b/Week04/decorators_bilal_ayakdas.py
@@ -0,0 +1,29 @@
+from time import time
+import tracemalloc
+
+
+def performance(fn):
+    if not hasattr(performance, "counter"):
+        setattr(performance, "counter", 0)
+
+    if not hasattr(performance, "total_time"):
+        setattr(performance, "total_time", 0.0)
+
+    if not hasattr(performance, "total_mem"):
+        setattr(performance, "total_mem", 0)
+
+    def calculate_perf(*args, **kwargs):
+
+        tracemalloc.start()
+        begin_time = time()
+        result = fn(*args, **kwargs)
+        end_time = time()
+        current, peak = tracemalloc.get_traced_memory()
+
+        setattr(performance, "counter", getattr(performance, "counter") + 1)
+        setattr(performance, "total_time", getattr(performance, "total_time") + (end_time - begin_time))
+        setattr(performance, "total_mem", getattr(performance, "total_mem") + peak)
+
+        return result
+
+    return calculate_perf