Are there any known issues with Ofast?

On Tue, Aug 13, 2019, 21:56 Eli Zaretskii <eliz@gnu.org> wrote:

> > From: "otadmor ." <otadmor@gmail.com>
> > Date: Tue, 13 Aug 2019 21:46:48 +0300
> > Cc: Uwe Brauer <oub@mat.ucm.es>, emacs-devel@gnu.org
> >
> > When compiling emacs for daily use is it better to compile with -O? Or
> without -O at all?
> > Which optimization level is suggested?
>
> Using -O0 produces a binary that's slower, but if it crashes or you
> need to debug it, the information you can report is more full and
> reliable.  Letting the build use the default optimization produces a
> faster program, but it's harder to debug.
>
> What to do is up to you.  I debug the development version of Emacs
> quite a lot, so I always build the development snapshots with -O0.
>