Arrow is pretty cool, although I haven't had the opportunity yet to use it.

I skimmed the paper you linked and wondered, how one measures the ser/de time a query takes or more generally how one would estimate the possible speedup of using Arrow Flight for communication with a database.

Do you by chance have any insights in that direction?

At work we have a Java application, that produces a big amount of simulation results (ca. 1Tb per run), which are stored in a database. I suspect, that a lot of time is wasted for ser/de, when aggregating the results, but it would be good to have some numbers.