mailbox classificataion

[Matthias Andree]

> Now consider that a daemon would still have to do everything that
> bogofilter does now in terms of reading and writing to the database
> and on top of that we add the copying of data back and forth. It would
> definitely be slower all around.
> 
> Having said all of that. A bogofilter daemon that only handled
> classifications might be quite fast, especially if we use a fast
> readonly database like DJ Bernstein's CDB.

It might be faster, but if it's worth the effort, is a question that is
left unanswered. We'd always have to keep the sources for the data base
around, and there are in fact approaches that just store changes in a
journal and then merge back by building a new cdb.

Apart from that, I'd think that one of the free reimplementations (there
are at least two, one is in Debian, one is from Michael Tokarev) would
be the choice; however, I wonder if that really makes so much of a
difference. The MTA is way more expensive in terms of I/O and overhead
anyways.

-- 
Matthias Andree