Create decorators_gokay_sahin.py

Author: katex35

Week04/decorators_gokay_sahin.py

@@ -0,0 +1,52 @@
+import time
+import psutil
+
+total_time = 0
+total_mem = 0
+counter = 0
+
+def performance(fn):
+    """
+    A decorator function to measure the performance of a given function by tracking 
+    both its execution time and memory usage. 
+
+    This decorator calculates the time taken for the function to run and the 
+    memory used before and after its execution. It also maintains a global counter 
+    of how many times the decorated function has been called, along with 
+    accumulating the total time and memory usage.
+
+    :param fn: Function to be decorated and monitored.
+    :type fn: Callable
+    :return: A wrapper function that monitors performance of the original function.
+    :rtype: Callable
+    
+    Global Variables:
+    - **total_time** (float): Accumulates the total execution time across all invocations.
+    - **total_mem** (int): Accumulates the total memory difference across all invocations.
+    - **counter** (int): Tracks how many times the decorated function has been executed.
+    
+    Example usage::
+
+        @performance
+        def my_function():
+            pass
+        
+        my_function()
+    """
+    def wrapper(*args, **kwargs):
+        global total_time, total_mem, counter
+        process = psutil.Process()
+
+        mem_before = process.memory_info().rss
+        time_before = time.time()
+
+        counter += 1
+        fn(*args, **kwargs)
+
+        time_after = time.time()
+        total_time += time_after - time_before
+
+        mem_after = process.memory_info().rss
+        total_mem += mem_after - mem_before
+
+    return wrapper