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Re: bug#18752: 24.3.94; Why is Cygwin Emacs 2x quicker than Windows Emacs?
- From: Eli Zaretskii <eliz at gnu dot org>
- To: Fabrice Niessen <fni-news at pirilampo dot org>
- Cc: 18752 at debbugs dot gnu dot org, cygwin at cygwin dot com, dmoncayo at gmail dot com
- Date: Sat, 18 Oct 2014 08:42:48 +0300
- Subject: Re: bug#18752: 24.3.94; Why is Cygwin Emacs 2x quicker than Windows Emacs?
- Authentication-results: sourceware.org; auth=none
- References: <86h9z2rb42 dot fsf at example dot com> <83siim1z6h dot fsf at gnu dot org> <86iojimmjg dot fsf at example dot com>
- Reply-to: Eli Zaretskii <eliz at gnu dot org>
> From: Fabrice Niessen <fni-news@pirilampo.org>
> Cc: 18752@debbugs.gnu.org, cygwin <cygwin@cygwin.com>, dmoncayo@gmail.com
> Date: Fri, 17 Oct 2014 23:08:51 +0200
>
> > You also forgot to tell what compiler options were used for each
> > build. E.g., if the Cygwin build is optimized, whereas the MinGW
> > build is not, the twofold speedup is expected (I generally see
> > a factor of 2.5 between an optimized and unoptimized build).
>
> I have no idea how Cygwin Emacs gets compiled, nor Windows Emacs (done
> by Dani). Putting them in Cc.
As Ken points out, the variable system-configuration-options is the
way to tell.
Given that the Cygwin build is optimized, it suffices to show that the
MinGW one isn't, to explain the difference in speed.
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