Think you've mastered the art of server performance? Think again.
An interesting article by Poul-Henning Kamp, FreeBSD developer at http://queue.acm.org/detail.cfm?id=1814327
Would you believe me if I claimed that an algorithm that has been on the books as "optimal" for 46 years, which has been analyzed in excruciating detail by geniuses like Knuth and taught in all computer science courses in the world, can be optimized to run 10 times faster?
You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump