Window XP Task Manager

[Shokun]

The low priority is only because while you are viewing the task manager, it lowers the priority to save energy or whatnot. While you have the XIV window active, it will run at normal priority. Tested this just now, it's simple if your XIV window is smaller than your screen resolution or have more than one screen, just have them both visible at the same time and toggle between the windows to see priority change.

//The program Ketone linked is also written and updated around beta and release in 2010, and was meant originally for beta client only. I would not recommend using the program as it can possibly mess up your system, changing process priorities at a whim is not exactly safe.