new_contents: import time
  
  class Profiler(object):
      def __init__(self):
          pass
  
      def start(self):
          self.t = time.time()
          self.c = time.clock()
  
      def since(self):
          return {
              "time": time.time() - self.t,
              "clock": time.clock() - self.c
          }
  
  
subject: Add profiler