Pretty much boils down to the amont of info the UI has to display at once every time it refreshes/opens/etc...
FOR EXAMPLE when your crafting something and you have your long list craft-able recipes open the game DROPS to like less than 1 dps after each item you craft as it seems to refresh the list each time. However if you hide all those designs in your list by checking the " only craftable" check box and removing everything in the list but whatever it is your making the FPS drop is barely noticeable.
FOR EXAMPLE when your crafting something and you have your long list craft-able recipes open the game DROPS to like less than 1 dps after each item you craft as it seems to refresh the list each time. However if you hide all those designs in your list by checking the " only craftable" check box and removing everything in the list but whatever it is your making the FPS drop is barely noticeable.