We are already thinking about the creation of performance analyze tool for Kixtart scripts.
Currently we are using ideas of it. Reason: everybody thinks the script is slow, but mostly the usage of roaming profiles slowdown the performance of logon-process.

Our ideas are:

• current construction will be used for creation of a detail report. not only the current position of script will be logged, but also the amount of lines executed will be logged. the impact of "LOOP" can influence the progress of a script enormously.
  
• additional code can be added without influencing the script code. example of such command can be: ";($analyze)".
  
• making subroutine an external script. so anyone can modify it easily.
  

All ideas for implementation of it are welcome.
Greetings.