I just saw that my addon loses about 300kb of memory a few seconds after logging in/ reloading the interface. I can't realy explain where that amount of memory could come from. Is this just garbage from the lua compiler or something? Or do I have a more or less serious bug in my code?
If your addon uses embedded libraries, then what you're seeing is normal and expected, since the copies of each library contained in your addon are loaded and then discarded if they are not newer than the copies of each library already loaded by some other addon.