On Tue, Nov 7, 2023 at 9:47 AM Nathan Bossart <nathandboss...@gmail.com> wrote: > > Presently, we ask compilers to autovectorize checksum.c and numeric.c. The > page checksum code actually lives in checksum_impl.h, and checksum.c just > includes it. But checksum_impl.h is also used in pg_upgrade/file.c and > pg_checksums.c, and since we don't ask compilers to autovectorize those > files, the page checksum code may remain un-vectorized.
Poking in those files a bit, I also see references to building with SSE 4.1. Maybe that's an avenue that we should pursue? (an indirect function call is surely worth it for page-sized data)
