Update timing

The display image and result data are sent to the operator view through a number of buffers.

The result data is updated whenever the expression associated with the output element's display changes. For example, if you display the result of a PatternMatching step, the value will be updated each time the step is run. However, if you are displaying a value whose expression is a combination of the results of multiple steps, the value will be retransmitted and redisplayed every time one of the expression's components is updated. To reduce the frequency of these updates, you can accumulate the results in a variable using the Store step and display the value of the variable in the operator view. The result data will then be updated only when the Store step sets the value.

For more information on storing variables, refer to the Procedure for adding and managing variables section in Chapter 25: Variables and the Store step.