I'm using Win7 and am experiencing slow import from CD (15 mins per disc), and slowness when changing track metadata (genre, year, etc). Basically, any change made to the library is taking a long, long time to complete.
I had the same issue in WinVista as well. My library is quite large, the Itunes Music Library XML file is about 17 MB in my case.
Is anyone else having this issue? I tried recreating the library (i.e. reimporting all of my media files from the itunes folder) after doing a clean install of Win7 recently and the issue persists. I believe it to be due to the size of that XML file that has to be updated for every change but I'm not aware of any solution or resolution to this.
I have found that you can easily fix this problem by starting iTunes in Safe Mode. Quit iTunes and hold Command + Option and then launch it. Click OK or Continue and then when you change movie metadata it is instant. I have no idea why this works and while it is a small hassle - well worth it since the spinning beach ball takes forever and is frustrating.
I am still having brutally slow metadata update wait times. from what I can tell, they are all due to itunes needing to immediately re-write the library and xml file after any metadata changes when your library goes past a certain level of complexity. by re-adding all of my songs (53K songs, 30GB) to a new library, or stripping all of the playlists (about 500, half of them smart, heavily nested interdependencies) from my existing library, i see that metadata changes are only folded in after all user activity ceases for a few seconds. in my normal library, any changes is written immediately. I've been working with an apple senior support tech on this and am told he's talking to the at least one programmer about the matter.
it's **** to do anything in my itunes for the last few years now and it's been getting worse...
not the end of the world, but boy does it take the smile off my face when i have to deal with it for an hour to do 5 minutes worth of work some times....