Sebastian Schwarz <seschwar@gmail.com> writes: > Allow me add to this RFE. > > On 2017-02-28, Steven Allen wrote: >> Currently, notmuch fetches keys synchronously. This can be >> *very* slow (I fetch keys over tor) and locks up emacs for the >> duration. Therefore, this fetch really should be >> asynchronous. > > Even with all keys already present signature verification takes > some time as well. It would be nice if this was done > asynchronously as well. This would greatly improve the speed of > opening threads with large numbers of signed messages. Offhand, that sounds even harder. With a noticable loss in security, we could cache the verifications in the database so the cost is only paid once. d