repo: and path: moved out of SQL, so the operator-only row measures something
different now and the note that it is a range seek was wrong. The rest of the
table is re-measured on an idle machine: the previous run's p95 column was
mostly contention, which is why conversation looked 3.4x faster at p95 rather
than the 1.7x it actually is.
Adds what this PR does not settle: which process may unlink and rebuild the
index is PR 3b's, and PR 4 is only the first thing that makes reading it
reachable.
Jinwoo-H
5b739473e5