High resource usage when verifying a signature

[Johannes Zarl-Zierl]

On Sunday 19 July 2015 01:42:34 Daniel Kahn Gillmor wrote:
> I suspect what's taking a long time is an update to the trustdb.  one
> workaround is to put no-auto-check-trustdb in ~/.gnupg/gpg.conf, and
> then have a nightly cronjob that runs "gpg2 --check-trustdb".

...and sure enough "gpg2 --check-trustdb" takes around a minute, the same 
duration as the arbitrary lockups in kmail.

Thanks again, this is very probably the cause!

Cheers,
  Johannes