I'm not sure what config/build stuff they tweaked but some type of object introspection took a HUGE performance hit, something 100x slower. This made certain stuff that handled tons of objects and object checks, specifically DBIC in my case, unusable.

I'll apologize right away for being too lazy too look it all up. I wonder if looking it up would have taken longer than apologizing for not doing... Or to explain why I needed to apologize. Ah, well, I like to hear myself type anyway.