fastest way to transfer data between 2 VIs in TestStand

Hi, I have a TestStand sequence which calls a step for data acquisition (DataAcq) and a step for data analysis (DataAna). The 2 steps are 2 different VIs.

The DataAcq pass data to TestStand, then TestStand pass the data to the DataAna. Running just one single thread in TestStand this is not the fastest way. Passing data directly trhu Labview using functional global or even file global is faster.

But, running in TestStand multiple threads in parallel, passing data thru TestStand is still the fastest way.

I tried with functional globals, file globals and DataValues reference but are all slower.

Is there any other faster way to transfer data in such an application?

Thanks a lot.