From: Thomas Lord <lord@emf.net>
To: Thien-Thi Nguyen <ttn@gnuvola.org>
Cc: Stefan Monnier <monnier@IRO.UMontreal.CA>, emacs-devel@gnu.org
Subject: Re: Release plans
Date: Sat, 30 Aug 2008 16:07:51 -0700 [thread overview]
Message-ID: <48B9D2C7.4070103@emf.net> (raw)
In-Reply-To: <87myiub7tm.fsf@ambire.localdomain>
Thien-Thi Nguyen wrote:
> So no, i don't think the bottleneck would be the buffer access (for this
> design), because the subprocess does not really need to access the buffer.
> Changes to the buffer that have not yet hit the filesystem can be
> communicated by publishing some portion of `buffer-undo-list' (which is
> also relatively lightweight).
>
So, the sub-process basically contains a text editor
in this design, albeit one without redisplay code and
with an unusual, limited command set. That need for
redundant code to make this thing work helps to prove
that, indeed, the absence of dynamic loading (including
just shared memory regions for buffers) creates make-work
to work around it.
I'm also skeptical about the performance claims here.
A full update involves changing the buffer, print + system
calls to inform the sub-process, system calls + read to
get back the results of the parse updates, and then the
actual text property updates. For interactive typing
that can probably keep up on a modern machine but
for other stuff it can easily be a performance bottleneck.
(Still, even if it is not, it's doing it "the hard way".)
> and it can be very costly to pass that text to the subprocess and
> then process the returned value (which may look like a list of text
> properties to add to various parts of the text).
>
> Well...
>
> A DLL could be significantly more efficient. The difference can be as
> large as "on-the-fly" vs "batch".
>
> ...i suppose i'll have to agree that all these "could be" scenarios are
> possible. My view is that given the requirement of external symbol tables
> (and other state), the biggest win for both performance and maintainability
> is to go asynchronous. If you want async from a subprocess, no worries,
> but if you want async in-process, you need to either design (and debug and
> maintain) "ethreads", or make Emacs play nice w/ pthreads or quickthreads
> or phase-of-the-moon-threads or whathaveyou. Then, you need to make sure
> every visitor treats your program counter w/ the respect it deserves.
> That's a lot of thankless and brutish police work.
>
That seems exaggerated. A hook in the interact loop that locked
a shared mem buffer briefly while asking for updates from an
incremental parser / ide-helper doesn't seem like it would be all that
hard to get right.
-t
next prev parent reply other threads:[~2008-08-30 23:07 UTC|newest]
Thread overview: 338+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-12 14:34 Release plans A Soare
2008-08-12 14:52 ` Lennart Borgman (gmail)
2008-08-12 17:14 ` Alan Mackenzie
2008-08-13 6:26 ` Richard M. Stallman
2008-08-13 9:20 ` Alan Mackenzie
2008-08-14 5:19 ` Richard M. Stallman
2008-08-14 8:38 ` Alan Mackenzie
2008-08-14 9:33 ` Johannes Weiner
2008-08-14 9:49 ` Alfred M. Szmidt
2008-08-14 10:04 ` Johannes Weiner
2008-08-14 10:30 ` Alan Mackenzie
2008-08-14 11:07 ` Johannes Weiner
2008-08-14 11:44 ` Tassilo Horn
2008-08-14 12:27 ` Johannes Weiner
2008-08-15 12:45 ` Richard M. Stallman
2008-08-14 12:39 ` Alan Mackenzie
2008-08-14 13:15 ` Johannes Weiner
2008-08-14 13:28 ` Alan Mackenzie
2008-08-14 13:41 ` Johannes Weiner
2008-08-14 17:08 ` Stephen J. Turnbull
2008-08-14 14:30 ` Gilaras Drakeson
2008-08-14 18:00 ` Stephen J. Turnbull
2008-08-15 12:45 ` Richard M. Stallman
2008-08-15 14:18 ` Alan Mackenzie
2008-08-15 17:54 ` Stephen J. Turnbull
2008-08-15 12:45 ` Richard M. Stallman
2008-08-15 16:29 ` Johannes Weiner
2008-08-16 10:40 ` Richard M. Stallman
2008-08-14 10:37 ` Alfred M. Szmidt
2008-08-14 11:24 ` Johannes Weiner
2008-08-14 12:54 ` Alfred M. Szmidt
2008-08-14 13:31 ` Johannes Weiner
2008-08-14 14:02 ` Alfred M. Szmidt
2008-08-14 16:55 ` Stephen J. Turnbull
2008-08-15 12:45 ` Richard M. Stallman
2008-08-16 1:41 ` Lennart Borgman (gmail)
2008-08-17 7:16 ` Richard M. Stallman
2008-08-15 3:41 ` Richard M. Stallman
2008-08-15 4:04 ` Sean O'Rourke
2008-08-15 20:12 ` Michael Ekstrand
2008-08-15 5:08 ` Johannes Weiner
2008-08-16 0:08 ` Richard M. Stallman
2008-08-16 5:14 ` Johannes Weiner
2008-08-15 17:20 ` Thomas Lord
2008-08-16 10:39 ` Richard M. Stallman
2008-08-16 12:05 ` joakim
2008-08-17 7:16 ` Richard M. Stallman
2008-08-17 9:32 ` joakim
2008-08-18 6:14 ` Richard M. Stallman
2008-08-18 7:19 ` Tassilo Horn
2008-08-18 8:03 ` Stefan Monnier
2008-08-18 8:26 ` joakim
2008-08-19 12:21 ` Richard M. Stallman
2008-08-19 13:02 ` Johannes Weiner
2008-08-20 3:47 ` Richard M. Stallman
2008-08-20 5:20 ` Johannes Weiner
2008-08-19 13:42 ` Tassilo Horn
2008-08-20 3:48 ` Richard M. Stallman
2008-08-18 14:20 ` Gilaras Drakeson
2008-08-18 17:13 ` Stephen J. Turnbull
2008-08-18 17:42 ` Paul R
2008-08-19 12:21 ` Richard M. Stallman
2008-08-20 0:01 ` Stephen J. Turnbull
2008-08-21 23:09 ` Richard M. Stallman
2008-08-22 0:34 ` whither GNU Thomas Lord
2008-08-22 0:17 ` Juanma Barranquero
2008-08-22 3:40 ` David Robinow
2008-08-22 7:36 ` Johannes Weiner
2008-08-23 5:09 ` Richard M. Stallman
2008-08-22 10:21 ` Juanma Barranquero
2008-08-22 21:31 ` Thomas Lord
[not found] ` <858wuoad0u.fsf@lola.goethe.zz>
2008-08-23 4:56 ` Thomas Lord
2008-08-16 16:29 ` Release plans Stephen J. Turnbull
2008-08-16 21:04 ` Thomas Lord
2008-08-16 21:35 ` Alan Mackenzie
2008-08-16 22:43 ` Stephen J. Turnbull
2008-08-17 7:31 ` Alan Mackenzie
2008-08-18 0:01 ` Stephen J. Turnbull
2008-08-18 10:18 ` Alan Mackenzie
2008-08-18 17:58 ` Stephen J. Turnbull
2008-08-18 20:20 ` Dynamic loading (was: Release plans) Stefan Monnier
2008-08-18 22:18 ` Stephen J. Turnbull
2008-08-20 16:15 ` Dynamic loading Stefan Monnier
2008-08-20 16:57 ` joakim
2008-08-25 13:09 ` Stephen J. Turnbull
2008-08-26 16:37 ` Richard M. Stallman
2008-08-18 21:09 ` Release plans Alan Mackenzie
2008-08-18 23:27 ` Johannes Weiner
2008-08-19 10:23 ` Alan Mackenzie
2008-08-19 11:56 ` Johannes Weiner
2008-08-19 9:46 ` Stephen J. Turnbull
2008-08-19 12:36 ` Robert J. Chassell
2008-08-20 5:55 ` Stephen J. Turnbull
2008-08-20 17:48 ` Robert J. Chassell
2008-08-25 1:34 ` Stephen J. Turnbull
2008-08-25 10:47 ` Robert J. Chassell
2008-08-25 13:13 ` Stephen J. Turnbull
2008-08-25 15:19 ` Robert J. Chassell
2008-08-25 17:11 ` Thomas Lord
2008-08-26 4:10 ` Stephen J. Turnbull
2008-08-26 10:59 ` Robert J. Chassell
2008-08-27 5:00 ` Stephen J. Turnbull
2008-08-27 11:37 ` Robert J. Chassell
2008-08-28 5:42 ` Stephen J. Turnbull
2008-08-28 10:17 ` Robert J. Chassell
2008-08-26 16:37 ` Richard M. Stallman
2008-08-26 18:14 ` Thomas Lord
2008-08-27 18:54 ` Richard M. Stallman
2008-08-27 20:33 ` Paul R
2008-08-29 2:41 ` Richard M. Stallman
2008-08-29 5:34 ` Thomas Lord
2008-08-29 11:39 ` Bruce Stephens
2008-08-29 13:11 ` Lennart Borgman (gmail)
2008-08-29 19:23 ` Thomas Lord
2008-08-29 20:03 ` Thien-Thi Nguyen
2008-08-29 20:20 ` Stefan Monnier
2008-08-29 20:53 ` Lennart Borgman (gmail)
2008-08-29 23:24 ` Thomas Lord
2008-08-29 22:56 ` Thomas Lord
2008-08-30 19:51 ` Thien-Thi Nguyen
2008-08-30 23:07 ` Thomas Lord [this message]
2008-08-31 9:09 ` Thien-Thi Nguyen
2008-08-29 22:53 ` Thomas Lord
2008-08-31 9:27 ` Thien-Thi Nguyen
2008-08-29 19:13 ` Thomas Lord
2008-08-29 23:48 ` Richard M. Stallman
2008-09-01 6:11 ` Richard M. Stallman
2008-09-01 18:25 ` Thomas Lord
2008-08-27 22:32 ` Thomas Lord
2008-08-27 21:57 ` Alfred M. Szmidt
2008-08-28 0:10 ` Thomas Lord
2008-08-29 2:40 ` Richard M. Stallman
2008-08-29 5:30 ` Thomas Lord
2008-08-27 22:09 ` Alan Mackenzie
2008-08-28 1:10 ` Thomas Lord
2008-09-01 6:11 ` Richard M. Stallman
2008-09-01 18:09 ` Thomas Lord
2008-09-02 1:09 ` Richard M. Stallman
2008-09-02 2:18 ` Thomas Lord
2008-09-02 14:13 ` Richard M. Stallman
2008-09-02 20:48 ` Thomas Lord
2008-09-01 18:20 ` Stefan Monnier
2008-09-01 20:17 ` Thomas Lord
2008-09-01 19:53 ` Stefan Monnier
2008-09-01 21:23 ` Thomas Lord
2008-09-02 3:26 ` Stephen J. Turnbull
2008-09-02 20:43 ` Thomas Lord
2008-09-03 5:08 ` Stephen J. Turnbull
2008-08-27 23:09 ` Lennart Borgman (gmail)
2008-08-28 0:22 ` Thomas Lord
2008-08-28 1:01 ` Lennart Borgman (gmail)
2008-08-26 21:25 ` joakim
2008-08-29 2:41 ` Richard M. Stallman
2008-08-19 15:52 ` Alan Mackenzie
2008-08-25 14:39 ` Stephen J. Turnbull
2008-08-25 22:01 ` Alan Mackenzie
2008-08-25 22:19 ` Lennart Borgman (gmail)
2008-08-26 4:54 ` Stephen J. Turnbull
2008-08-26 7:16 ` ["agree"] " Thomas Lord
2008-08-27 5:10 ` Stephen J. Turnbull
2008-08-27 16:00 ` Thomas Lord
2008-08-26 10:02 ` Alan Mackenzie
2008-08-27 5:38 ` Stephen J. Turnbull
2008-08-27 21:06 ` Alan Mackenzie
2008-08-27 21:12 ` Lennart Borgman (gmail)
2008-08-28 20:01 ` Sean Sieger
2008-08-28 6:07 ` Stephen J. Turnbull
2008-08-27 15:57 ` Thien-Thi Nguyen
2008-08-27 18:33 ` tomas
2008-08-28 6:09 ` Stephen J. Turnbull
2008-08-28 8:14 ` tomas
2008-08-28 7:25 ` Alan Mackenzie
2008-08-28 8:23 ` tomas
2008-08-28 6:26 ` Stephen J. Turnbull
2008-08-19 16:31 ` Thomas Lord
2008-08-20 3:47 ` Richard M. Stallman
2008-08-20 6:14 ` Stephen J. Turnbull
2008-08-19 12:21 ` Richard M. Stallman
2008-08-19 13:04 ` Paul R
2008-08-20 3:48 ` Richard M. Stallman
2008-08-17 2:37 ` Thomas Lord
2008-08-17 8:01 ` Alan Mackenzie
2008-08-17 17:42 ` Thomas Lord
2008-08-17 21:07 ` Alan Mackenzie
2008-08-17 21:24 ` Johannes Weiner
2008-08-17 21:33 ` Alfred M. Szmidt
2008-08-17 22:31 ` Johannes Weiner
2008-08-18 3:06 ` Thomas Lord
2008-08-18 6:14 ` Richard M. Stallman
2008-08-17 21:45 ` Thien-Thi Nguyen
2008-08-18 6:14 ` Richard M. Stallman
2008-08-18 17:09 ` Thomas Lord
2008-08-19 16:28 ` René Kyllingstad
2008-08-20 3:48 ` Richard M. Stallman
2008-08-17 7:16 ` Richard M. Stallman
2008-08-15 3:41 ` Richard M. Stallman
2008-08-15 17:17 ` Thomas Lord
2008-08-16 10:40 ` Richard M. Stallman
2008-08-16 7:14 ` Alfred M. Szmidt
2008-08-14 17:24 ` Stefan Monnier
2008-08-15 3:41 ` Richard M. Stallman
2008-08-15 14:04 ` Alan Mackenzie
2008-08-15 15:10 ` [OT] " Yavor Doganov
2008-08-16 7:05 ` Miles Bader
2008-08-17 7:16 ` Richard M. Stallman
2008-08-15 16:35 ` Stephen J. Turnbull
2008-08-15 18:07 ` Thomas Lord
2008-08-16 10:40 ` Richard M. Stallman
2008-08-16 10:40 ` Richard M. Stallman
-- strict thread matches above, loose matches on Subject: below --
2008-08-14 15:36 Robert J. Chassell
2008-08-14 15:51 ` Johannes Weiner
2008-08-14 21:00 ` Robert J. Chassell
2008-08-14 22:58 ` Johannes Weiner
[not found] <SRV-ADEXCHyjlMFAVNL0000090e@waccglobal.org>
2008-08-13 14:07 ` Mike Rowse
2008-08-13 1:30 A Soare
2008-08-12 20:51 A Soare
2008-08-12 21:35 ` Lennart Borgman (gmail)
2008-08-12 20:16 christophe
2008-08-12 18:57 A Soare
2008-08-12 18:54 A Soare
2008-08-12 18:58 ` Lennart Borgman (gmail)
2008-08-12 18:41 A Soare
2008-08-12 18:46 ` Lennart Borgman (gmail)
2008-08-12 18:55 ` Eli Zaretskii
2008-08-12 18:38 A Soare
2008-08-12 18:36 A Soare
2008-08-12 18:04 A Soare
2008-08-12 18:21 ` Lennart Borgman (gmail)
2008-08-12 18:25 ` Lennart Borgman (gmail)
2008-08-12 15:34 A Soare
2008-08-12 15:59 ` Lennart Borgman (gmail)
2008-08-12 13:51 A Soare
2008-08-12 13:37 A Soare
2008-08-12 13:50 ` martin rudalics
2008-08-12 17:16 ` Johannes Weiner
2008-08-12 14:02 ` Lennart Borgman (gmail)
2008-08-12 14:54 ` Paul R
2008-08-12 18:37 ` Eli Zaretskii
2008-08-12 19:16 ` Óscar Fuentes
2008-08-12 19:41 ` Paul R
2008-08-12 13:11 A Soare
2008-08-12 13:20 ` Juanma Barranquero
2008-08-12 15:54 ` Johannes Weiner
2008-08-13 6:26 ` Richard M. Stallman
2008-08-13 7:05 ` Johannes Weiner
2008-08-12 13:24 ` Lennart Borgman (gmail)
2008-08-12 12:21 A Soare
2008-08-12 12:33 ` Lennart Borgman (gmail)
2008-08-12 13:42 ` Michael Ekstrand
2008-08-13 6:27 ` Richard M. Stallman
2008-08-13 7:14 ` Alex Ott
2008-08-12 14:45 ` Miles Bader
2008-08-12 14:56 ` Lennart Borgman (gmail)
2008-08-12 16:47 ` Drew Adams
2008-08-13 20:20 ` Richard M. Stallman
2008-08-12 18:34 ` Eli Zaretskii
2008-08-05 2:53 dhruva
2008-08-05 4:43 ` tomas
2008-08-05 21:48 ` Richard M. Stallman
2008-07-31 9:54 dhruva
2008-07-31 22:01 ` Richard M Stallman
2008-07-30 9:58 dhruva
2008-07-31 1:59 ` Richard M Stallman
2008-07-31 9:30 ` Alan Mackenzie
2008-07-31 22:01 ` Richard M Stallman
2008-08-01 14:15 ` Frank Schmitt
2008-08-01 14:51 ` Miles Bader
2008-08-02 5:12 ` Richard M Stallman
2008-08-02 7:20 ` Frank Schmitt
2008-08-03 1:33 ` Richard M. Stallman
2008-08-03 11:38 ` Juanma Barranquero
2008-08-03 22:42 ` Richard M. Stallman
2008-08-03 23:16 ` Juanma Barranquero
2008-08-04 15:55 ` Davi Leal
2008-08-05 21:48 ` Richard M. Stallman
2008-08-12 4:48 ` Thomas Lord
2008-08-12 7:30 ` Miles Bader
2008-08-12 15:37 ` Thomas Lord
2008-08-12 10:32 ` Richard M. Stallman
2008-08-12 16:08 ` Thomas Lord
2008-08-13 20:20 ` Richard M. Stallman
2008-08-03 13:48 ` Nic
2008-08-03 22:42 ` Richard M. Stallman
2008-08-01 15:31 ` Alan Mackenzie
2008-08-02 5:12 ` Richard M Stallman
2008-08-02 17:12 ` Alan Mackenzie
2008-08-02 23:46 ` Lennart Borgman (gmail)
2008-08-03 1:33 ` Richard M. Stallman
2008-08-03 18:01 ` Alan Mackenzie
2008-08-04 15:33 ` Richard M. Stallman
2008-08-12 4:24 ` Thomas Lord
2008-08-12 10:32 ` Richard M. Stallman
2008-08-12 16:12 ` Thomas Lord
2008-08-03 1:33 ` Richard M. Stallman
2008-08-03 17:51 ` Alan Mackenzie
2008-08-04 15:33 ` Richard M. Stallman
2008-08-04 19:08 ` Alan Mackenzie
2008-08-05 8:05 ` Richard M. Stallman
2008-08-01 17:39 ` Davi Leal
2008-08-02 5:12 ` Richard M Stallman
2008-07-14 15:07 Chong Yidong
2008-07-17 0:27 ` Juri Linkov
2008-07-17 6:41 ` David Kastrup
2008-07-21 4:49 ` Chong Yidong
2008-07-21 8:06 ` Thien-Thi Nguyen
2008-07-21 13:32 ` Chong Yidong
2008-07-21 14:19 ` Thien-Thi Nguyen
2008-07-23 20:52 ` Michael Albinus
2008-07-23 21:42 ` Chong Yidong
2008-07-26 7:39 ` Eli Zaretskii
2008-07-26 21:33 ` Richard M Stallman
2008-07-27 3:22 ` Eli Zaretskii
2008-07-27 17:14 ` Richard M Stallman
2008-07-27 19:14 ` Eli Zaretskii
2008-07-28 21:46 ` Richard M Stallman
2008-07-29 3:12 ` Eli Zaretskii
2008-07-30 3:47 ` Richard M Stallman
2008-07-30 17:33 ` Eli Zaretskii
2008-07-28 13:43 ` Juri Linkov
2008-07-28 14:10 ` Chong Yidong
2008-07-28 14:33 ` Juri Linkov
2008-07-29 17:11 ` Chong Yidong
2008-07-29 17:54 ` Stefan Monnier
2008-07-29 15:21 ` Roland Winkler
2008-08-02 17:34 ` Eli Zaretskii
2008-08-09 18:29 ` Eli Zaretskii
2008-08-09 18:34 ` Juanma Barranquero
2008-08-09 19:06 ` Eli Zaretskii
2008-07-31 2:10 ` Bastien
2008-07-31 2:43 ` Chong Yidong
2008-07-31 8:06 ` Lennart Borgman (gmail)
2008-08-01 2:53 ` Bastien
2008-08-01 19:26 ` Jay Belanger
2008-08-01 19:32 ` Chong Yidong
2008-08-02 16:12 ` Jay Belanger
2008-08-02 4:08 ` Stephen J. Turnbull
2008-08-02 17:30 ` Richard M Stallman
2008-08-05 4:04 ` Bill Wohler
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