This is a quick benchmark to help test changes to the bayes storage
system.  It also happens to work as a benchmark for other changes.  It
requires that you install the code you wish to benchmark, but upgrades
to make the scripts more in-tree friendly would be accepted.

You will also need Proc::Background.

Quick Start:

Create 8 buckets for your mail (mbox files), 4 each of ham and spam.
They should be in rough date order (oldest in bucket 1).  Name them
hambucketX.mbox and spambucketX.mbox where X is the bucket number.

I suggest at least 1000 messages per bucket, for sure it should not be
less than 200, and maybe even 300 depending on how much autolearning
happens in phase 2.

Take hambucket1.mbox and copy the first half of the messages to
hamforget1.mbox.  Do the same for spambucket1.mbox.

Verify that the passwords and paths in the tests directories are
valid/correct and look over the scripts in the helper directory,
especially the username/passwords in the sql based helper scripts.

run-bench db_file db_file.1

This will create a results/db_file.1 directory and put all of the test
data in that directory.

You can tail -f results/db_file.1/output.txt to watch the test
progress.

More Detailed view:

The benchmark consistes of several phases, normally between each phase
there will be a sa-learn --dump magic, a database size check (if
available) and an sa-learn --backup:

Phase 1:
  This is the learning phase, here we run sa-learn on hambucket1.mbox
  and spambucket1.mbox, getting the timings for each.

Phase 2: This is the spamd scanning phase.  We startup a spamd and
  then startup a forking script that throws all messages in
  hambucket2.mbox, hambucket3.mbox, spambucket2.mbox and
  spambucket4.mbod at the daemon using spamc.

  After this is done it does an sa-learn --sync and an
  sa-learn --force-expire.

Phase 3:
  This is the forget phase.  We use sa-learn to forget all the
  messages in hamforget1.mbox and then do it again for
  spamforget1.mbox.

Phase 4:
  This is the spamassassin scan phase.  Here we scan the
  hambucket4.mbox and then the spambucket4.mbox using the spamassassin
  script.

I suggest running each benchmark 3 times to make sure your test is not
influenced by other system activities too much.