@Mrs_Often: Oh, I know, I wrote a
whole post ranting about it for KFMon's doc ;p.
@jeff47: I'm mildly confused, because this has nothing to do w/ kobopatch ;p. It has, on the other hand, everything to do with the ePub renderer being slow as molasses. Read the config, there's a bunch of context about it near the bottom. (Things should be more or less okay with a stock config, though).