Add performance decorator for function statistics

Introduced a performance decorator to collect function execution statistics including time and memory usage.

Author: AleynaGultekin

Week04/decorators_aleyna_gultekin.py

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+import time
+import tracemalloc
+import functools
+
+
+class performance:
+    """Decorator class collecting performance statistics of functions."""
+    counter = 0
+    total_time = 0.0
+    total_mem = 0
+
+    def __init__(self, func):
+        functools.update_wrapper(self, func)
+        self.func = func
+
+    def __call__(self, *args, **kwargs):
+        was_tracing = tracemalloc.is_tracing()
+        if not was_tracing:
+            tracemalloc.start()
+        mem_before = tracemalloc.get_traced_memory()[0]
+        t0 = time.perf_counter()
+        try:
+            return self.func(*args, **kwargs)
+        finally:
+            t1 = time.perf_counter()
+            mem_after, peak = tracemalloc.get_traced_memory()
+            if not was_tracing:
+                tracemalloc.stop()
+            performance.counter += 1
+            performance.total_time += t1 - t0
+            performance.total_mem += max(peak - mem_before, 0)