[Bug 1840510] Re: Please enable PGO and LTO for arm64

[Dan Streetman]

To clarify, that's the release schedule for python 3.7.5.

The pgo/lto change for arm64 is already in the 19.10 Ubuntu release of
python3 (3.7.4), so once the 3.7.5 version is released upstream, then
Debian will update to it, then Ubuntu 19.10 (or 20.04) will update to
it, then it will be backported to 18.04.

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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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