Hello,
It could be several things. What version of LabVIEW are you using? Is it the same on both machines? Do you have the same add-on software installed and activated? Specifically, MathScript has a tight relationship with the Control Design and Simulation Module. If one machine has it but the other doesn't, that could be a cause.
What kind of speed differences are you seeing? Is it the time to run a MathScript Node? Or a script in the MathScript Window? How much slower does it get?
jattas
LabVIEW MathScript R&D