It's for drag latency: https://github.com/google/walt/blob/master/docs/DragLatency.md https://github.com/google/walt/blob/master/docs/DragLatency.... It may be

It's for drag latency: https://github.com/google/walt/blob/master/docs/DragLatency.md https://github.com/google/walt/blob/master/docs/DragLatency.... It may be counter intuitive, but touch-down latency and drag latency can be very different: on some hardware one may be faster or slower than the other. That's why both are measured. Note: I worked with Mark to review most of his work on this project.