I wish that when people posted a performance win, they would include a theory explaining it. Unexpected speedups are usually noise, bugs, or harness issues. No program is faster due to the superior manly virtue of its programmer. Every effect has a cause.

When, from first principles, something shouldn't be faster, yet it is, you dig and dig until you understand. You don't just say your shit rules and the other thing sux0rz. If you do, you'll regret it: if you don't understand how you got a win, you don't understand how to keep it.