Add performance metrics to the decorator

Initialize performance metrics for the decorator.

Author: BugraFiloglu

Week04/decorators_ilyas_bugra_filoglu.py

@@ -1,31 +1,31 @@
+performance.counter = 0
+performance.total_time = 0.0
+performance.total_mem = 0
+
 import time
 import tracemalloc
 from functools import wraps
 
 tracemalloc.start()
 
-
 def performance(fn):
     @wraps(fn)
     def wrapper(*args, **kwargs):
-      
         performance.counter += 1
-      
+
         tracemalloc.reset_peak()
         start_time = time.perf_counter()
         result = fn(*args, **kwargs)
-      
-        end_time = time.perf_counter()
-      
-        performance.total_time += end_time - start_time
-      
-        current_memory, peak_memory = tracemalloc.get_traced_memory()
+        elapsed = time.perf_counter() - start_time
+
+        performance.total_time += elapsed
+
+        _, peak_memory = tracemalloc.get_traced_memory()
         performance.total_mem += peak_memory
 
         return result
 
     return wrapper
-  
 
 performance.counter = 0
 performance.total_time = 0.0