On Mon, Nov 30, 2020 at 9:20 AM Krunal Bauskar <krunalbauskar@gmail.com> wrote:
> Some of us may be surprised by the fact that enabling lse is causing regression (1816 -> 892 or 714 -> 610) with HEAD
itself.
> While lse is meant to improve the performance. This, unfortunately, is not always the case at-least based on my
previousexperience with LSE.too.
I doubt this is correct. As Tom shown upthread, Apple clang have LSE
enabled by default [1]. It might happen that --CFLAGS="-O2
-march=armv8-a+lse" disables some other optimizations, which are
enabled by default in Apple clang...
Links
1. https://www.postgresql.org/message-id/663376.1606432828%40sss.pgh.pa.us
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Regards,
Alexander Korotkov
