old_contents: import sys
  import time
  
  print(sys.argv)
  
  if len(sys.argv) != 2:
      print("wrong number of arguments")
      sys.exit(1)
  
  START = time.time()
  exec("sys.argv[1]")
  END = time.time()
  print(START-END)
  
new_contents: import sys
  import time
  
  print(sys.argv)
  
  if len(sys.argv) != 2:
      print("wrong number of arguments")
      sys.exit(1)
  
  with open(sys.argv[1]) as inputstr:
      DATA = inputstr.read()
  
  START = time.time()
  exec(DATA)
  END = time.time()
  print(START-END)
  
subject: make simple timing function