Re: Gnus: caching message headers?

[Eric Abrahamsen]

Gregory Heytings via Users list for the GNU Emacs text editor
<help-gnu-emacs@gnu.org> writes:

>>> I'm clearly not an expert, but would it not be enough to save and
>>> retrieve the contents of nntp-server-buffer in
>>> nnimap-retrieve-headers? Or are you thinking about a more generic
>>> solution that would work with all backends?
>>
>> We could do something ad-hoc for nnimap, but yes I'm thinking of
>> something more generic. All the header data (what's used to create
>> the Summary display) is held in variables that are local to the
>> Summary buffer, so in principle there's no reason we couldn't just
>> leave the local data in place when we leave the buffer. There are
>> plenty of obstacles to making it work correctly, but in principle I
>> don't see why not.
>>
>
> I would be happy with an ad-hoc solution for nnimap, which I suppose
> is the most used backend these days (but I could be wrong).  In fact I
> wasn't thinking of just leaving the local data in place when the
> summary buffer is left (which could eat a lot of memory), but instead
> to store them permanently in a cache on disk, and to read that file
> again instead of doing a "UID FETCH" on the server.

Check out wgreenhouse's suggestion!