[Techtalk] Performance metrics for email processing

[Terri Oda]

I'm going to be running performance tests on some email filters.

A simple "filter A took X minutes, filter B took Y minutes... for Z 
messages." is all I have in mind at the moment, but what other metrics 
are useful when it comes to email processing?  Has anyone seen 
performance test suites they like?  Any potential pitfalls I should 
know about?  Any good papers that detail ways to do this?

The tests are going to be done on a debian testing machine, either 
using exim as the mail filter or piping the test set of emails through 
the filters directly to limit other factors.

  Terri