"every synchronized function"

Right. Synchronized is the key word here. The vast majority of code doesn't involve synchronized, and therefore the vast majority of objects don't have locks associated with them. That's quite important.

Those classes which do use synchronized were just going to create a ReentrantLock held for the duration of the call anyway, in which case it's all monitorEnter and monitorExit, regardless.

> This is going to put a damper on any further conversation.

Sadge.