Quitting a nnvirtual group is slow

[Alexander Baier]

Hello everbody,

I am currently experimenting with virtual groups and noticed that it
takes way longer to close (by hitting `g`) a virtual group, than a
normal group (that is nntp or nnimap).

The virtual group consists of 4 nnimap groups that contain ~1.3k
messages in total.  One of these groups contains ~1k messages and
quiting it is instantaneous, just like quitting nntp groups.  Both the
virtual and the 4 nnimap groups are completely cached.

Does anyone know, why quitting the virtual group takes such a long time
(about 5 seconds) compared to the other ones?

--
Regards,

  Alex