example.py

class Response:
   data: list

async def get_data():
   # we have 250k rows of lists with 7 tuples - str and int
   return []

async def handler_empty():
  await get_data(); # 2 sec
  return {'data': []} # 0 sec

async def handler_render_json():
  return {'data': await get_data()} # 5 sec

async def handler_render_response():
   return Response(data=await get_data()) # 8sec

async def handler_render_response_with_typed_result() -> Response:
   return Response(data=await get_data()) # 12sec