On Mon, 11 Apr 2022 at 09:44, Thomas Munro <thomas.mu...@gmail.com> wrote: > David Rowley privately reported a performance regression when sorting > single ints with a lot of duplicates, in a case that previously hit > qsort_ssup() but now hits qsort_tuple_int32() and then has to call the > tiebreaker comparator. Note that this comes up only for sorts in a > query, not for eg index builds which always have to tiebreak on item > ptr. I don't have data right now but that'd likely be due to:
I've now added this as an open item for v15. David
