From: Dmitry Antipov <dmantipov@yandex.ru>
To: Stefan Monnier <monnier@IRO.UMontreal.CA>
Cc: Emacs development discussions <emacs-devel@gnu.org>
Subject: Re: [Emacs-diffs] /srv/bzr/emacs/trunk r109131: Return more descriptive data from Fgarbage_collect.
Date: Wed, 18 Jul 2012 13:38:03 +0400 [thread overview]
Message-ID: <500683FB.6000509@yandex.ru> (raw)
In-Reply-To: <jwvliih60ws.fsf-monnier+emacs@gnu.org>
On 07/18/2012 10:33 AM, Stefan Monnier wrote:
> That's not regular enough. Every entry in the list should have the
> same shape (NAME SIZE USED FREE). For buffers, (buffers SIZE USED) is OK
> because that's like having FREE set to nil, but for strings (STRING
> INTERNAL-SIZE USED-STRINGS USED-STRING-BYTES FREE-STRING) is not good,
> we want instead to have 2 entries:
>
> (strings SIZE USED FREE)
> and
> (string-bytes 1 USED FREE)
IIUC, FREE is always between 0 and SBLOCK_BYTES after compacting sblocks,
so I don't see too much sense here.
> same for vectors, where we need one entry for vectors and another for
> vector slots (and BTW, please keep it vector slots rather than vector
> bytes: the SIZE part is there specifically so that code that requires
> byte counts can do the conversion later).
IMHO counting vector slots is poor idea because:
1) vectors are of different length, so, having just a number of vector
slots, we don't know how much of struct vectorlike_header we have
(and they eats memory too);
2) this doesn't count extra space beyond Lisp_Objects in pseudovectors
and doesn't count space used by bool vectors.
Dmitry
next prev parent reply other threads:[~2012-07-18 9:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <E1SrNZW-0003vA-5g@vcs.savannah.gnu.org>
2012-07-18 6:33 ` [Emacs-diffs] /srv/bzr/emacs/trunk r109131: Return more descriptive data from Fgarbage_collect Stefan Monnier
2012-07-18 9:38 ` Dmitry Antipov [this message]
2012-07-18 10:46 ` Stefan Monnier
2012-07-18 12:46 ` Dmitry Antipov
2012-07-19 7:55 ` Stefan Monnier
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