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Wed Aug 9 03:52:52 EDT 2017 · https://mail.python.org/pipermail/python-dev/2017-August/148809.html

On Wed, 9 Aug 2017 13:36:28 +1000
Nick Coghlan <ncoghlan at gmail.com> wrote:
> On 8 August 2017 at 10:12, Gregory P. Smith <greg at krypto.org> wrote:
> > I don't know whether it is beneficial or not - but having the capability to
> > build LTO without PGO seems reasonable. I can review any pull requests
> > altering configure.ac and Makefile.pre.in to make such a change.  
> 
> Being able to separate them seems useful even if it's just from the
> performance research perspective of comparing "PGO only", "LTO only"
> and "PGO+LTO".

That does not mean "LTO only" deserves a configure option, though.  PGO
is difficult to set up manually so it's fair that we provide dedicated
build support for it.  LTO should just be a matter of tweaking CFLAGS
and LDFLAGS.

Regards

Antoine.

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[Python-Dev] first post introduction and question regarding lto