When compiling emacs for daily use is it better to compile with -O? Or
without -O at all?
Which optimization level is suggested?

On Tue, Aug 13, 2019, 17:29 Eli Zaretskii <eliz@gnu.org> wrote:

> > From: Uwe Brauer <oub@mat.ucm.es>
> > Date: Tue, 13 Aug 2019 12:51:33 +0200
> >
> >    >> | Version                                  | init file | without
> init |
> >    >>
> |------------------------------------------+-----------+--------------|
> >    >> | b06917a4912a60402025286d07d4a195749245c4 | 50 sec    | 1-2 sec
>     |
> >    >> | 1d75604eaded6a8482d28d57bc8e6a4d99d5caee | 15 sec    | 1-2 sec
>     |
> >    >>
> >    >> #+end_src
> >    >>
> >    >>
> >    >> Any idea whats up?
> >    >>
> >    >> How can I debug this?
> >
> >    > Bisect your customizations to see which part takes the lion's share
> of
> >    > the time, I'd say.
> >
> > It was my fault. I bisected different commits (using mercurial)
> >
> > My configuration script was
> >
> >
> > ./configure CFLAGS='-O0 -g3' --enable-checking='yes,glyphs'
> --enable-check-lisp-object-type --prefix=/opt/emacs27
> --with-x-toolkit=athena --with-mailutils
>
> OK, an unoptimized build is expected to be about 2.5 to 3 times slower
> than the optimized one.
>
>