From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Daniel Colascione <dan.colascione@gmail.com>
Cc: Andreas Schwab <schwab@linux-m68k.org>, Leo <sdl.web@gmail.com>,
emacs-devel@gnu.org
Subject: Re: How and when to use GCPRO?
Date: Mon, 27 Dec 2010 23:15:19 -0500 [thread overview]
Message-ID: <jwv4o9yilgf.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <4D195B6D.2060305@gmail.com> (Daniel Colascione's message of "Mon, 27 Dec 2010 19:37:17 -0800")
> Hrm. You learn something every day --- I thought Emacs was doing precise
> GC the way it has since time immemorial. How much of a win was the
> GC_MARK_STACK conservative scanning approach?
As long as we still support platforms that use GCPROs, it's not a win
at all. Tho it may have beneficial effects on the performance, I don't
know (it could also be detrimental to performance, by the way, because
of extra work it has to do every time we allocate memory for Lisp
objects in order to later on be able to conservatively tell whether an
integer happens to point to an allocated memory area).
Stefan
next prev parent reply other threads:[~2010-12-28 4:15 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-27 9:21 How and when to use GCPRO? Leo
2010-12-27 10:15 ` Andreas Schwab
2010-12-27 10:38 ` Leo
2010-12-27 11:17 ` Andreas Schwab
2010-12-27 16:00 ` Stefan Monnier
2010-12-27 17:51 ` Andreas Schwab
2010-12-28 1:01 ` Stefan Monnier
2010-12-28 1:33 ` Daniel Colascione
2010-12-28 2:17 ` Stefan Monnier
2010-12-28 3:37 ` Daniel Colascione
2010-12-28 4:15 ` Stefan Monnier [this message]
2010-12-28 4:36 ` Conservative scanning (was: Re: How and when to use GCPRO?) Daniel Colascione
2010-12-28 17:07 ` How and when to use GCPRO? Richard Stallman
2010-12-27 19:15 ` Leo
2010-12-27 19:26 ` Common Lisp like feature expressions (was: How and when to use GCPRO?) Leo
2010-12-27 19:38 ` Andreas Schwab
2010-12-27 19:57 ` Leo
2010-12-28 1:01 ` Common Lisp like feature expressions Stefan Monnier
2010-12-28 15:26 ` Leo
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