http://www.spec.org/auto/cpu2006/Docs/400.perlbench.html
400.perlbench SPEC CPU2006 Benchmark Description: The primary component of the [benchmark] workload is the Open Source spam checking software SpamAssassin. SpamAssassin is used to score a couple of known corpora of both spam and ham (non-spam), as well as a sampling of mail generated from a set of random components. SpamAssassin has been heavily patched to avoid doing file I/O, and currently (8/31/2004) does not use the Bayesian filtering. (found via the fastmail blog. cool!) --j.