From: Stefan Monnier <monnier@iro.umontreal.ca>
To: rms@gnu.org
Cc: rudalics@gmx.at, kalman.reti@gmail.com, emacs-devel@gnu.org
Subject: Re: mark_object crash in 22.1 and latest CVS (as of tonight)
Date: Sat, 17 Nov 2007 22:08:44 -0500 [thread overview]
Message-ID: <jwvy7cwb6d7.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <E1ItRgw-0006mW-2n@fencepost.gnu.org> (Richard Stallman's message of "Sat, 17 Nov 2007 12:42:50 -0500")
> The `evaporate' option is inherently dangerous since it reclaims the
> marker object forcefully without checking that nobody else is holding on
> to it, even tho it comes from a plain normal argument and the caller may
> very well have kept another ref to it somewhere.
> There are low-level constructs in Emacs that can crash Emacs if misused.
> This mere fact is not enough reason to get rid of it.
It's an "optimization" and nothing more. In my book, if an optimization
is unsafe, it had better make a good case for itself. As it stands
I see no evidence that this optimization is ever useful. As long as
nobody can show us numbers that demonstrate a measurable performance
impact, I think we're better off without this optimization.
Stefan
next prev parent reply other threads:[~2007-11-18 3:08 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-09 3:55 mark_object crash in 22.1 and latest CVS (as of tonight) Kalman Reti
2007-11-09 11:32 ` Kalman Reti
2007-11-10 10:19 ` Kalman Reti
2007-11-11 5:22 ` Richard Stallman
2007-11-12 11:40 ` Kalman Reti
2007-11-12 22:03 ` Stefan Monnier
2007-11-13 0:30 ` Kalman Reti
2007-11-13 20:03 ` Richard Stallman
2007-11-14 17:39 ` Kalman Reti
2007-11-14 18:51 ` Stefan Monnier
2007-11-15 1:00 ` Kalman Reti
2007-11-15 17:09 ` Richard Stallman
2007-11-16 12:05 ` Kalman Reti
2007-11-16 14:07 ` Kalman Reti
2007-11-16 17:28 ` martin rudalics
2007-11-16 17:56 ` Kalman Reti
2007-11-17 4:54 ` Richard Stallman
2007-11-17 5:43 ` Kalman Reti
2007-11-16 19:04 ` Stefan Monnier
2007-11-16 21:52 ` martin rudalics
2007-11-16 22:09 ` Stefan Monnier
2007-11-16 22:16 ` Stefan Monnier
2007-11-16 23:59 ` Kalman Reti
2007-11-17 4:25 ` Stefan Monnier
2007-11-17 17:42 ` Richard Stallman
2007-11-18 3:08 ` Stefan Monnier [this message]
2007-11-18 22:45 ` Richard Stallman
2007-11-18 23:22 ` David Kastrup
2007-11-19 7:50 ` Stefan Monnier
2007-11-19 19:03 ` Richard Stallman
2007-11-17 4:53 ` Richard Stallman
2007-11-15 3:08 ` Richard Stallman
2007-11-15 8:38 ` Kalman Reti
2007-11-16 20:48 ` Kalman Reti
2007-11-16 21:59 ` Stefan Monnier
2007-11-16 23:09 ` martin rudalics
2008-02-04 11:35 ` buffer-undo-list (was: mark_object crash in 22.1 and latest CVS (as of tonight)) Johan Bockgård
2008-02-04 21:44 ` buffer-undo-list Stefan Monnier
2008-02-11 17:58 ` buffer-undo-list Stefan Monnier
2007-11-13 5:10 ` mark_object crash in 22.1 and latest CVS (as of tonight) Richard Stallman
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