new_contents: import cProfile
  
  def profile_this(fn):
      def profiled_fn(*args, **kwargs):
          fpath = fn.__name__ + '.profile'
          prof = cProfile.Profile()
          ret = prof.runcall(fn, *args, **kwargs)
          prof.dump_stats(fpath)
          return ret
      return profiled_fn
  
  # Just use the following decorator to get a pstat profile of it after runtime
  #@profile_this
  
subject: add profiler helper function