Minimizing SubVI Overhead

Inlining a subVI into its calling VIs helps minimize the overhead associated with calling the subVI.

When you inline a subVI, G Web Development Software inserts the compiled code of the subVI into the compiled code of the calling VI. If you then make changes to the subVI, G Web Development Software recompiles all calling VIs of that subVI to include those changes. Essentially, inlining a subVI removes the need to call the subVI at run time. Instead, the subVI code executes inside the compiled code of the calling VI.

A subVI that you want to inline cannot have any of the following characteristics:

  • Contains recursion
  • Contains certain diagram nodes, such as control references. These nodes generate edit-time error messages if you enable subVI inlining.
Complete the following steps to inline a subVI.
  1. On the Document tab, in the Behavior section, click Properties to access the property settings for the subVI.
  2. Place a checkmark in the Inline subVI into calling VIs checkbox.
  3. Set VI Reentrancy to Stateless or Stateful to configure reentrant execution.
  4. Click OK.