But note that that those benchmarks pretty much are the worst case for PTI. Each of the queries is either near trivial (single pkey lookup) or the most trivial

But note that that those benchmarks pretty much are the worst case for PTI. Each of the queries is either near trivial (single pkey lookup) or the most trivial (SELECT 1), therefore the send/recv syscalls to/from the clients are taking the most time. If you instead have queries that do a bit more actual work this'd look very different.