[Bug 1840510] [NEW] Please enable PGO and LTO for arm64

[Ali Saidi]

Public bug reported:

The rules file conditionally enables PGO and LTO in the python3 build
and while it's enabled for many platforms it's not enabled for arm64.
This is worth about 30% performance. Please enable it.

A patch is available here with the original debian bug report:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=934812

** Affects: python3-defaults (Ubuntu)
     Importance: Undecided
         Status: New

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Title:
  Please enable PGO and LTO for arm64

Status in python3-defaults package in Ubuntu:
  New

Bug description:
  The rules file conditionally enables PGO and LTO in the python3 build
  and while it's enabled for many platforms it's not enabled for arm64.
  This is worth about 30% performance. Please enable it.

  A patch is available here with the original debian bug report:
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=934812

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