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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: Sat, 05 Dec 2020 17:57:09 +0200
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Cc: ofv@wanadoo.es, rudalics@gmx.at, emacs-devel@gnu.org
To: Gregory Heytings <ghe@sdf.org>
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> Date: Sat, 05 Dec 2020 15:39:51 +0000
> cc: Óscar Fuentes <ofv@wanadoo.es>, emacs-devel@gnu.org
> From: Gregory Heytings via "Emacs development discussions." <emacs-devel@gnu.org>
> 
> 
> Like (2), at least with GCC on 64-bit GNU/Linux.  Apparently Eli does not 
> see this on MS-Windows.

I'd be surprised if the OS had anything to do with that.  If someone
can afford compiling a 32-bit build --with-wide-int on GNU/Linux using
GCC 9 or later, we could see for sure.