Thanks for the direct & frank answer. But doesn't DirectRT do disk I/O to read stimulus files during the ITI in order to prepare the next trial, without affecting performance during the trial? If so, couldn't DirectRT just as well dump some data during the ITI? As you indicate, it comes down to a tradeoff between performance and data safety, I just wonder if every customer wants to make the same tradeoff.

-- David McFarlane, Professional Faultfinder