Why not try to measure snappiness directly? There's tons of research about this in UX land, which is not my field but I'm aware of it, defining precisely which

Why not try to measure snappiness directly? There's tons of research about this in UX land, which is not my field but I'm aware of it, defining precisely which kind of interactions at what latencies feel instantaneous and so an and so forth. There is a lot of focus on measuring the system in linux land (cpu, memory, io, etc) from the perspective of a user (and by users), but its actually often the least informative. Developers and operators often benefit more from this level of measurement. I suspect this is because its much easier to measure system utilization in a standardized way. Maybe this is a nice project to develop user friendly and standardized application level benchmarking for linux desktop (these are more readily available in web development).