My TK/TCL programs take about 50 times longer to be displayed on the desktop. I set the option on the logon screen to use fvwn and the program took its normal timw in being presented.
Do you have information on how to reproduce this problem?
I tried running a couple of Tcl/Tk programs, and had no speed issues whatsoever. As no reply was received to my earlier query, I am closing this with "works for me".