How to reduce inventory clutter and log in faster:
1. Do a search for "demo" and "demos" - delete those suckers
2. Do a search for fitmesh sizes you don't wear, e.g. if you don't wear Belleza, search for that and delete it. Be careful to delete objects and not folders.
3. Delete unused saved outfits. Each outfit you save creates 20 or more shortcuts. That adds up. If you delete a hundred saved outfits, it will delete thousands of shortcuts in your inventory that eat up time during login.
On Firestorm, logins seem to start intermittently failing around the 410K, so it's good to clear out some of the old junk. I just reduced mine from 410K down to 370K with the steps above.