&lt;html&gt;&lt;body&gt;<div>You might want to take a look at the elisp-only completion I wrote for nevermore.<br>Address harvesting is pretty fast and anyway is asynchronous.<br><br><a href="https://github.com/tjim/nevermore/blob/42febedb45da6158e26503359f864f772d332de0/nm.el#L561">https://github.com/tjim/nevermore/blob/42febedb45da6158e26503359f864f772d332de0/nm.el#L561</a><br><br></div>&lt;/body&gt;&lt;/html&gt;