You might want to take a look at the elisp-only completion I wrote for nevermore. Address harvesting is pretty fast and anyway is asynchronous.
https://github.com/tjim/nevermore/blob/42febedb45da6158e26503359f864f772d332de0/nm.el#L561 ? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://notmuchmail.org/pipermail/notmuch/attachments/20140906/8092d995/attachment.html>
