JDE-2.5.3 SemanticDB: too much of a good thing?

I just upgraded to NT Emacs 21.3.1 (i386-mingw-nt5.1.2600) and JDEE 2.3.5 Plenty of new features, but i'll need to read a bunch to learn to appreciate them. My current concern is with semantic and its continuous background parsing. Which would not be so bad, but contrary to the

Re: JDE-2.5.3 SemanticDB: too much of a good thing?

I have always loved the responsiveness of Emacs, but this background semantic parsing is ruining the experience. My biggest problem is having it cache stuff to files when I try to shut down. This can take 30+seconds for lots of big files while its saving the cached parse output or