The code in the attached hook function is dramatically slower in 21.0
than 20.4.  What happened?
;;;;;;;;;;;;; Set up
(defun sb-init-apropos-faces ()
  (setq apropos-symbol-face (make-face 'apropos-symbol-face))
  (set-face-foreground 'apropos-symbol-face "Purple")
  (when (featurep 'xemacs)
    (make-face-bold 'apropos-symbol-face))
  (setq apropos-keybinding-face (make-face 'apropos-keybinding-face))
  (set-face-foreground 'apropos-keybinding-face "Blue")
  (set-face-underline-p 'apropos-keybinding-face t)
  (setq apropos-label-face (make-face 'apropos-label-face))
  (set-face-foreground 'apropos-label-face "DeepPink")
  (and running-xemacs (make-face-italic 'apropos-label-face))
  ;; Yuck! #### FIXME in apropos.el
  (setq apropos-label-face `(face ,apropos-label-face
                                  mouse-face highlight))
  (setq apropos-property-face (make-face 'apropos-property-face))
  (set-face-foreground 'apropos-property-face "Yellow4")
  (and running-xemacs (make-face-bold-italic 'apropos-property-face))
  (when (boundp 'apropos-mode-hook)
    (remove-hook 'apropos-mode-hook 'sb-init-apropos-faces)))
(when (or running-xemacs
          window-system)
  (if running-xemacs
      (add-hook 'apropos-mode-hook 'sb-init-apropos-faces)
    (sb-init-apropos-faces)))
;;;;;;;;;;;;;;
M-x apropos label