On 6/4/25 19:35, Thomas Munro wrote:
On Thu, Jun 5, 2025 at 3:44 AM Joe Conway <m...@joeconway.com> wrote:
If you go from anything pre-glibc-2.21 to post-glibc-2.21 I think you
will find that even with the same data files you get a different sort.
The same patch that caused the performance regression [1] (still present
in up to date glibc) also cause changes in sort order via C code alone.
Finding more cases probably involves running something a little like
Jeremy's torture tests across a huge gallery of versions and
combinations of cross-version recompiled definitions. Or something
like that...
Sounds like great fun!
;-)
--
Joe Conway
PostgreSQL Contributors Team
Amazon Web Services: https://aws.amazon.com
