slow bibtex menu access

[Sebastian Luque]

Clicking on any item in my bibtex menu while editing *.bib files is taking
outrageously long times on my system:

GNU Emacs 21.3.1 (i386-pc-linux-gnu, X toolkit, Xaw3d scroll bars) of
2005-02-03 on trouble, modified by Debian

I've tried setting bibtex-maintain-sorted-entries to t and nil, but it
doesn't make a difference. It seems to be related to the size of the file,
as when I edit a blank or a few-entries long *.bib there's no problem. My
main reference file is 23,761 lines and that's when the menu is pretty
much unuseable. Does somebody know how to get around this?

Thanks,
-- 
Sebastian Luque