The Machine Settings Dialog

• Use threads: if set to yes, each time a function needs to be recalculated (because for example one of the input matrices changed content) a new thread is started (from a thread pool) and the recalculation is done in this thread.
  This means that more functions can be recalculated in the same time, avoiding the problems that happen sometimes with the spreadsheets, when a long operation takes the control of the whole spreadsheet and nothing else can be done until it is finished. Moreover, since the GUI is runned in a different thread, the GUI is not blocked by the functions calculation.
  
  If set to no, the same thread is used for all the functions and the GUI. This can be useful if the behaviour of the system is confusing with the option active. I personally never had problems in Matrex with threads, but I think it is a good idea to leave this possibility open.
  
  If set to Use projects settings, the use of threads depends, for each project, by the project's value of the equivalent setting. This means that the functions of some projects can be calculated in different threads, the functions of other projects can be calculated in the main application thread (which is the same one of the GUI).
  
  
• Functions write debug info: if set to yes, the functions have the possibility to write debug information in the log. This can be useful for example to trace a function's behaviour when it does not calculate correctly.
  
  If set to no the functions cannot write debug information on the loClicking on the OK button the dialog is closed and a message box requires to restart the machine for the settings to be effective.
  g, and this gives better performances.
  
  If set to Use projects settings, the settings of each project decide if its functions write debug in the log.
  
• Threads in the calculation pool: if threads are used, this is the maximum number of threads that can run in the same time in this machine, i.e. the maximum number of functions that can be calculated simultanously.
  If this number has been reached, the next calculation can only be done when a thread becomes available because another calculation is terminated.
  This number is valid for the whole machine, so the threads have to be shared among all the projects running in the machine in the same time.