I have asked this before and have not received an answer of fix  and I don't remember where the original question is--
I have one user that enters a lot of labor through WO-F (she is usually finishing sequences).  In the users screen she is listed as using this program a gazillion times!  When she restarts her computer the listings go away, only to start up again when she starts using the program again.  
It may be my imagination but work on other workstations seems compromised in terms of speed when this is going on.  
Is it her computer installation, or a program glitch, or is it in the category of don't know don't care 'cause you are imagining it?  

Yeah, I don't think that you should see any speed difference when this happens. The empty sessions aren't requesting data. They might tie up a little bit more memory but that should be it.
 
I don't see why the sessions couldn't be set to time out or something... It would ideally be nice if all Pervasive sessions timed out after 30 minutes and if a valid session timed out then Evo would reopen it and keep going. Well, a session with a current lock on a table or tables should probably not expire but everything else should be fair game. Granted, making the programs clean up after themselves would probably be an even better solution.

I suggest tar, feathers, and an industrial wood chipper. The chipper is optional I guess... They'll get the point either way.