Implement performance decorator for function metrics

Adds a performance decorator to measure time and memory usage of functions.

Author: sinemtanriver

Week04/decorators_sinem_tanriver.py

@@ -0,0 +1,30 @@
+import time
+import tracemalloc
+from functools import wraps
+
+
+def performance(func):
+    """Measures time and memory of the decorated function and keeps statistics."""
+    @wraps(func)
+    def wrapper(*args, **kwargs):
+        started_here = not tracemalloc.is_tracing()
+        if started_here:
+            tracemalloc.start()
+        tracemalloc.reset_peak()
+        start = time.perf_counter()
+        result = func(*args, **kwargs)
+        elapsed = time.perf_counter() - start
+        _, peak = tracemalloc.get_traced_memory()
+        if started_here:
+            tracemalloc.stop()
+
+        performance.counter += 1
+        performance.total_time += elapsed
+        performance.total_mem += peak
+        return result
+    return wrapper
+
+
+performance.counter = 0
+performance.total_time = 0
+performance.total_mem = 0