What is the Subroutine priority?
VIs that you set for Subroutine priority do not share execution time with other VIs. Use the Subroutine priority level in situations in which you want to minimize the overhead in a subVI that performs simple computations. However, there are some trade-offs. Subroutines cannot display front panel data, call timing or dialog box functions, or multitask with other VIs. Subroutines are generally most appropriate for VIs that do not require user interaction and are short, frequently executed tasks.
