Add performance decorator for function metrics

Week04/decorators_sema_erol.py

@@ -1,28 +1,22 @@
-import time
 import tracemalloc
+import time
 
-def performance(fn):
-    def _performance(*args, **kwargs):
-        # If the 'performance' function has not been called before, initialize static variables
-        if not hasattr(performance, "counter"):
-            setattr(performance, "counter", 0)
-            setattr(performance, "total_time", 0)
-            setattr(performance, "total_mem", 0)
-
-        performance.counter += 1
 
-        tracemalloc.start()
+def performance(func):
+    if not hasattr(performance,'counter'):
+        performance.counter = 0
+        performance.total_time = 0
+        performance.total_mem = 0
+
+    def perform(*args,**kwargs):
+        tracemalloc.start()  # start to follow memory
         start_time = time.time()
-
-        result = fn(*args, **kwargs)
-
+        result = func(*args, **kwargs)
         end_time = time.time()
-        current, peak = tracemalloc.get_traced_memory()
-        tracemalloc.stop()
-
-        performance.total_mem += peak
-        performance.total_time += (end_time - start_time)
-
+        used_memory = tracemalloc.get_traced_memory()[1]  # [0] gives current memory consumption but [1] gives total(max) memory consumption during thr last fallowing time
+        tracemalloc.stop()  # we started memeory following process only to find how much memory uses by thr called function not the entire program ,so we stop memory following when the jop of function is finished
+        performance.counter += 1
+        performance.total_time += end_time - start_time
+        performance.total_mem += used_memory
         return result
-
-    return _performance
+    return perform