From: Kenichi Handa <handa@m17n.org>
To: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>
Cc: emacs-devel@gnu.org, monnier@iro.umontreal.ca, pogonyshev@gmx.net
Subject: Re: very slow archive-mode
Date: Fri, 14 Mar 2008 12:43:15 +0900 [thread overview]
Message-ID: <E1Ja0p9-0002ot-74@etlken.m17n.org> (raw)
In-Reply-To: <wl63vqhxvl.wl%mituharu@math.s.chiba-u.ac.jp> (message from YAMAMOTO Mitsuharu on Fri, 14 Mar 2008 10:56:14 +0900)
In article <wl63vqhxvl.wl%mituharu@math.s.chiba-u.ac.jp>, YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp> writes:
> > Also, IIUC the 8-bit bytes that are not represented as a single byte
> > and not only more numerous, but they also take up more space (they
> > used to take up just 2 bytes but now they take up what 3? 4? 5
> > bytes?).
> IIUC, it still takes up just 2 bytes by cleverly using vacant UTF-8
> area (see character.h).
Yes.
> I think code_convert_region in Emacs 22 tried to avoid the repeated
> reallocations and copies by estimating the necessary buffer size from
> the intermediate result of conversion in progress. (And there were a
> cast problem that affected its performance:
> http://lists.gnu.org/archive/html/emacs-pretest-bug/2004-12/msg00197.html)
> Does the code conversion in Emacs 23 include such estimation?
Not yet. But it's not related to the problem of slow
set-buffer-multibyte.
---
Kenichi Handa
handa@ni.aist.go.jp
next prev parent reply other threads:[~2008-03-14 3:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-12 20:47 very slow archive-mode Paul Pogonyshev
2008-03-12 21:30 ` Stefan Monnier
2008-03-12 22:41 ` Juri Linkov
2008-03-13 7:51 ` Kenichi Handa
2008-03-13 15:04 ` Stefan Monnier
2008-03-13 15:08 ` Stefan Monnier
2008-03-14 1:56 ` YAMAMOTO Mitsuharu
2008-03-14 3:43 ` Kenichi Handa [this message]
2008-03-14 4:17 ` YAMAMOTO Mitsuharu
2008-03-14 1:03 ` Juri Linkov
2008-03-16 2:23 ` Kenichi Handa
2008-03-16 16:31 ` Juri Linkov
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