Recently I noticed that when I add or remove items from my avatar whether it's with the wardrobe or directly from the inventory I get huge freezes and if I add/remove too many objects at the same time I even crash. I got that from two different computers so it may not be a hardware issue. As soon as I remove the wardrobe HUD tho, everything works fine and I can browse my inventory without freezes.
I have over 6500 items in my wardrobe, maybe that's an issue?