.w3m/.sessions too damn big

[jidanni@xxxxxxxxxxx]

# ls -og .w3m/.sessions
-rw-r--r-- 1 1088225 2009-02-22 09:24 /home/jidanni/.w3m/.sessions
after only a day of browsing.
Emacs was slowing down.
OK, I deleted it and did
(setq
 ;;w3m-session-file /dev/null?
 w3m-session-crash-recovery nil
 w3m-session-deleted-keep-number 0
 w3m-session-automatic-keep-number 0
 w3m-session-autosave nil)
which seems to have stopped it from growing.
(No, I've never tired the sessions feature. All I know is that I'm not
the kind of person to remember to quit with a Q).

By the way, in (info "(emacs-w3m)Session Manager")

  If `w3m-session-automatic-save' is non-`nil', emacs-w3m saves the
  opened sessions automatically when quitting emacs-w3m.

You mean `w3m-session-autosave'. `w3m-session-automatic-save' is a
function.