There are no performance reasons for turning CTL or CJK on/off as far as I can recall. "Just" the explosion of bewildering extra features for users of plain-old-latin scripts.
Perhaps the least contentious solution is to additionally enable the CTL (or CJK) features on windows if a window keyboard layout is installed which falls into one of those categories. Filed an easy hack as bug 54493 to do that.
There are no performance reasons for turning CTL or CJK on/off as far as I can recall. "Just" the explosion of bewildering extra features for users of plain-old-latin scripts.
Perhaps the least contentious solution is to additionally enable the CTL (or CJK) features on windows if a window keyboard layout is installed which falls into one of those categories. Filed an easy hack as bug 54493 to do that.