Add performance decorator for function profiling

Week04/decorators_ilyas_bugra_filoglu

@@ -0,0 +1,31 @@
+import time
+import tracemalloc
+from functools import wraps
+
+def performance(func):
+    # initialize stats on the decorator itself
+    if not hasattr(performance, "counter"):
+        performance.counter = 0
+    if not hasattr(performance, "total_time"):
+        performance.total_time = 0.0
+    if not hasattr(performance, "total_mem"):
+        performance.total_mem = 0
+
+    @wraps(func)
+    def wrapper(*args, **kwargs):
+        tracemalloc.start()
+        tracemalloc.reset_peak()
+        start = time.perf_counter()
+
+        try:
+            return func(*args, **kwargs)
+        finally:
+            elapsed = time.perf_counter() - start
+            _, peak = tracemalloc.get_traced_memory()
+            tracemalloc.stop()
+
+            performance.counter += 1
+            performance.total_time += elapsed
+            performance.total_mem += peak
+
+    return wrapper