Really it depends on what functions you're using. Something that appears simple (one or two lines in the MathScript Node) could have a lot of code behind it that needs to execute. I would definitely tread with caution and benchmark as much as you can.
And another message from the help that might be of interest and likely isn't too surprising:
Caution (Real-Time Module) National Instruments does not guarantee and is not responsible for the jitter characteristics of the MathScript RT Module functions. Depending on the functions and data types you use, memory allocations might be required at run time, which can cause jitter in the real-time application. To ensure that the application meets timing requirements, National Instruments recommends that you benchmark (and you are solely responsible for testing) the jitter in your application before you deploy the application to the field.
Anyone have experience with Mathscript RT?
in Real-Time
Posted
For question 1,
Really it depends on what functions you're using. Something that appears simple (one or two lines in the MathScript Node) could have a lot of code behind it that needs to execute. I would definitely tread with caution and benchmark as much as you can.
And another message from the help that might be of interest and likely isn't too surprising:
http://zone.ni.com/reference/en-XX/help/371361F-01/lvtextmath/msfunc_classes/