On Mon, Nov 30, 2020 at 9:20 AM Krunal Bauskar <krunalbaus...@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 previous experience 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 ------ Regards, Alexander Korotkov
