73:  Why does Emacs take 20 seconds to visit a file?                         +
                                                                             +
  The usual cause is that the master lock file, `!!!SuperLock!!!' has been   +
  left in the lock directory somehow.  Delete it.                            +
                                                                             +
  Mark Meuer <meuer@geom.umn.edu> says that NeXT NFS has a bug where an      +
  exclusive create succeeds but returns an error status.  This can cause the +
  same problem.  Since Emacs's file locking doesn't work over NFS anyway,    +
  the best solution is to recompile Emacs with CLASH_DETECTION undefined.    +