M-x grep is too slow

[Jesper Harder]

Something has made `M-x grep' unbearably slow.  With 'emacs -Q' this
command

   M-x grep -nH -e while emacs/lisp/gnus/*.el

took over 20 minutes to complete -- I lost patience after that and
killed Emacs, so it might actually take hours.  For comparison the
same command takes 2-3 s in Emacs 21.3 and 1 s on the command line.


In GNU Emacs 21.3.50.21 (i686-pc-linux-gnu, GTK+ Version 2.0.2)
 of 2004-07-04 on defun.localdomain
configured using `configure '--with-gtk''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.iso88591
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

-- 
Jesper Harder                                <http://purl.org/harder/>