Add helper annotation for profiling functions

server/entertainment_decider/profiling.py

@@ -0,0 +1,22 @@
+from __future__ import annotations
+
+import cProfile
+from functools import wraps
+import pstats
+
+
+LIST_MAX_FUNCTION_COUNT = 40
+
+
+def profile(fun):
+    @wraps(fun)
+    def _fun(*args, **kwargs):
+        with cProfile.Profile() as pf:
+            ret = fun(*args, **kwargs)
+        pstats.Stats(pf).sort_stats(pstats.SortKey.CUMULATIVE).print_stats(
+            "entertainment_decider",
+            LIST_MAX_FUNCTION_COUNT,
+        )
+        return ret
+
+    return _fun