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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: The Emacs master is much slower than the emacs-27 branch.
Date: Fri, 04 Dec 2020 17:51:03 +0200
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Cc: acm@muc.de, emacs-devel@gnu.org
To: Stephen Berman <stephen.berman@gmx.net>
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In-Reply-To: <87v9dhr7i5.fsf@gmx.net> (message from Stephen Berman on Fri, 04
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> From: Stephen Berman <stephen.berman@gmx.net>
> Cc: acm@muc.de,  emacs-devel@gnu.org
> Date: Fri, 04 Dec 2020 15:05:54 +0100
> 
> > I just rebuilt emacs-27 with "make bootstrap", reran the benchmark, and
> > it took ~60 seconds, about a second faster than the previous
> > non-bootstrapped build.  The profile is similar to the previous one from
> > emacs-27, but I've attached for your perusal anyway.  I'll bootstrap
> > master too and run the benchmark there again.
> 
> On freshly bootstrapped master the benchmark took the same time as
> before, ~21 seconds, and the profile looks pretty much the same, so I
> haven't attached it, but will send it if you want to see it.

Thanks.  This is very strange.  What are the build options and the
features in each build? are they identical?