781 

   782         # enough 'delaywrite' prevents 'pack_dirstate' from dropping

   783         # timestamp of each entries in dirstate, because of 'now > mtime'

   784         delaywrite = self._ui.configint(b'debug', b'dirstate.delaywrite')

   785         if delaywrite > 0:

   786             # do we have any files to delay for?

   787             for f, e in pycompat.iteritems(self._map):

   788                 if e.need_delay(now):

   789                     import time  # to avoid useless import

   790 

   791                     # rather than sleep n seconds, sleep until the next

   792                     # multiple of n seconds

   793                     clock = time.time()

   794                     start = int(clock) - (int(clock) % delaywrite)

   795                     end = start + delaywrite

   796                     time.sleep(end - clock)

   797                     # trust our estimate that the end is near now

   798                     now = timestamp.timestamp((end, 0))

   799                     break