GNU bug report logs - #18752
24.3.94; Why is Cygwin Emacs 2x quicker than Windows Emacs?

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Package: emacs;

Reported by: Fabrice Niessen <fni-news <at> pirilampo.org>

Date: Fri, 17 Oct 2014 15:07:02 UTC

Severity: wishlist

Tags: notabug

Found in version 24.3.94

Done: Noam Postavsky <npostavs <at> users.sourceforge.net>

Bug is archived. No further changes may be made.

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Message #35 received at 18752 <at> debbugs.gnu.org (full text, mbox):

From: Ken Brown <kbrown <at> cornell.edu>
To: Eli Zaretskii <eliz <at> gnu.org>, Dani Moncayo <dmoncayo <at> gmail.com>
Cc: 18752 <at> debbugs.gnu.org, fni-news <at> pirilampo.org
Subject: Re: bug#18752: 24.3.94; Why is Cygwin Emacs 2x quicker than Windows
 Emacs?
Date: Sat, 18 Oct 2014 13:35:48 -0400

On 10/18/2014 12:17 PM, Eli Zaretskii wrote:
> Unoptimized builds make debugging easier, but are about 2 - 2.5 times
> slower than optimized ones.  For that reason, the usual practice is to
> produce unoptimized builds for snapshots and pretests, but optimized
> ones for official releases.
>
> Latest GCC versions support a -Og optimization switch that gives you
> the best of both worlds.

Do you happen to know how much of a performance difference there typically is 
between -Og and -O2?

Ken
This bug report was last modified 8 years and 344 days ago.

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