We received a report that our published ruleset is slow on large emails
(http://www.pccc.com/downloads/SpamAssassin/contrib/KAM.cf)
After doing our own profiling (using "Finding slow rules" under
http://wiki.apache.org/spamassassin/FasterPerformance), we have not been
able to reproduce anything more than the usual slowness from crunching
over a very large body of text. Our longest-running rules are simple
/(?:foo)|(?:bar)|.../i matches like __KAM_GALLERY2, which I don't
believe there is any way to further optimize without sacrificing
readability.
Can someone check our work and make sure we aren't doing anything wrong
wrt rule performance, or with our profiling that would give bad results?
- Spam Rule Slowness Joe Quinn
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