From: yyoncho <yyoncho@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: "Sébastien Chapuis" <sebastien@chapu.is>, 31138@debbugs.gnu.org
Subject: bug#31138: Native json slower than json.el
Date: Sat, 23 Mar 2019 22:23:49 +0200 [thread overview]
Message-ID: <CACCVLQWfCWg+wUuvKZu+n3_85yaOKH9CbCt9N+Y_waN18g+cLw@mail.gmail.com> (raw)
In-Reply-To: <83zhplo25s.fsf@gnu.org>
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Hi Eli,
Here it is the offending callstack.
https://gist.github.com/yyoncho/7032464b456f60270100c747f42885f8
Thanks,
Ivan
However, I cannot reproduce what you describe, not with the latest
> Emacs master branch. When I repeat the recipe you posted in
>
> https://gist.github.com/yyoncho/9e9c4e14734fdd9a22d6600a88a27ae1
>
> I get zero as the final value of the counter, not 32982. As I'd
> expect, as I don't see why kill-buffer-query-functions would be called
> in this scenario. This was in "emacs -Q", do you get a non-zero count
> even in "emacs -Q"?
>
I am also unable to reproduce it with "emacs -q", even it works fine right
after I start my Spacemacs based configuration. It happens after some time
on my system.
>
> To see why kill-buffer-query-functions is invoked in your case, I
> suggest the following:
>
> . Modify the above recipe to call 'message' inside
> my/test-query-function.
> . Run Emacs under GDB after putting a breakpoint in Fmessage (this
> is the C name of 'message').
> . Run your recipe. When the breakpoint in 'message' breaks, display
> the Lisp backtrace using the "xbacktrace" command (it is defined
> in src/.gdbinit in the Emacs source tree).
>
> Alternatively (and maybe easier for you), set debug-on-entry to
> trigger when my/test-query-function is called, then run your recipe,
> and look at the backtrace to see why it was called.
>
This does not work since apparently when the breakpoint is hit the
>
> I hope that either of these two ways will allow you to find the code
> which is responsible for calling kill-buffer-query-functions when JSON
> string is being parsed. Once we understand that, we could see how to
> avoid it.
>
> > If so, my suggestion would be to run Emacs under 'perf'
> > and see which parts of json-parse-string take most of the CPU time,
> > then we'd have solid basis for discussing the significance of the
> > calls to json_make_string in this scenario. If you want me to do the
> > 'perf' run (with the caveat that in "emacs -Q" it might run faster
> > than in your customized Emacs), please give a complete recipe, and I
> > will do it.
> >
> > Like I said in the first mail - I cannot give you the recipe since I am
> not able to track down what is causing that
> > slowdown and I need help on that. Can you give me a link on how to run
> emacs under "perf"?
>
> Here are a few:
>
> http://www.brendangregg.com/perf.html
>
> https://perf.wiki.kernel.org/index.php/Tutorial#Sampling_with_perf_record
>
> https://perf.wiki.kernel.org/index.php/Tutorial#Sample_analysis_with_perf_report
>
> The perf man pages are also useful.
>
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next prev parent reply other threads:[~2019-03-23 20:23 UTC|newest]
Thread overview: 161+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-12 19:13 bug#31138: Native json slower than json.el Sebastien Chapuis
2018-04-13 7:24 ` Eli Zaretskii
2018-04-15 14:40 ` Sebastien Chapuis
2018-04-15 15:19 ` Eli Zaretskii
2019-03-23 1:59 ` Sébastien Chapuis
2019-03-23 8:15 ` Eli Zaretskii
2019-03-23 9:40 ` Eli Zaretskii
2019-03-23 12:59 ` Sébastien Chapuis
2019-03-23 13:21 ` Eli Zaretskii
2019-03-23 13:31 ` yyoncho
2019-03-23 14:00 ` Eli Zaretskii
2019-03-23 14:32 ` yyoncho
2019-03-23 14:55 ` Eli Zaretskii
2019-03-23 15:27 ` yyoncho
2019-03-23 16:29 ` Eli Zaretskii
[not found] ` <CACCVLQW=_YngoTwXU+1BDvVVy5jwxSmDFUQJBvs8=PrP=fn=aw@mail.gmail.com>
2019-03-23 18:50 ` Eli Zaretskii
2019-03-23 20:23 ` yyoncho [this message]
2019-03-23 20:54 ` Eli Zaretskii
2019-03-23 21:04 ` yyoncho
2019-03-24 3:32 ` Eli Zaretskii
2019-03-24 9:35 ` yyoncho
2019-03-24 11:20 ` Eli Zaretskii
2019-03-24 11:37 ` yyoncho
2019-03-24 15:15 ` Eli Zaretskii
2019-03-24 18:24 ` yyoncho
2019-03-24 18:28 ` Eli Zaretskii
2019-03-24 20:57 ` yyoncho
2019-03-25 3:32 ` Eli Zaretskii
2019-03-25 5:44 ` yyoncho
2019-03-25 16:42 ` Eli Zaretskii
2019-03-25 18:20 ` yyoncho
2019-03-25 18:25 ` Eli Zaretskii
2019-03-25 19:16 ` yyoncho
2019-03-25 20:05 ` Eli Zaretskii
2019-03-25 21:34 ` yyoncho
2019-03-25 23:04 ` Dmitry Gutov
2019-03-26 3:51 ` Eli Zaretskii
2019-03-26 16:14 ` Eli Zaretskii
2019-03-26 17:45 ` yyoncho
2019-03-26 18:11 ` Eli Zaretskii
2019-03-26 18:15 ` yyoncho
2019-04-16 1:36 ` Dmitry Gutov
2019-04-16 2:38 ` Eli Zaretskii
2019-04-16 13:50 ` Dmitry Gutov
2019-04-16 15:13 ` Eli Zaretskii
2019-04-16 15:30 ` Dmitry Gutov
2019-04-16 16:10 ` Eli Zaretskii
2019-04-16 16:23 ` Dmitry Gutov
2019-04-16 16:44 ` Eli Zaretskii
2019-04-21 8:58 ` Eli Zaretskii
2019-04-21 9:15 ` Dmitry Gutov
2019-04-21 9:31 ` Eli Zaretskii
2019-04-21 10:23 ` yyoncho
2019-04-21 10:37 ` Eli Zaretskii
2019-04-21 11:38 ` yyoncho
2019-04-21 12:15 ` Eli Zaretskii
2019-04-21 13:28 ` yyoncho
2019-04-21 19:03 ` Eli Zaretskii
2019-04-21 20:13 ` Eli Zaretskii
2019-04-22 5:38 ` yyoncho
2019-04-22 8:01 ` Eli Zaretskii
2019-04-22 13:00 ` yyoncho
2019-04-22 13:17 ` Eli Zaretskii
2019-04-22 16:53 ` Ivan
2019-04-22 16:58 ` Eli Zaretskii
2019-04-21 22:17 ` Dmitry Gutov
2019-04-22 7:16 ` Eli Zaretskii
2019-04-22 13:54 ` Dmitry Gutov
2019-04-22 15:24 ` Eli Zaretskii
2019-04-22 15:31 ` Dmitry Gutov
2019-04-21 12:59 ` Philipp Stephani
2019-04-21 13:09 ` yyoncho
2019-04-21 13:33 ` Philipp Stephani
2019-04-22 11:48 ` Dmitry Gutov
2019-04-22 12:12 ` Eli Zaretskii
2019-04-22 12:24 ` Dmitry Gutov
2019-04-22 13:02 ` Eli Zaretskii
2019-04-22 15:02 ` Dmitry Gutov
2019-04-22 15:36 ` Eli Zaretskii
2019-04-22 16:16 ` Dmitry Gutov
2019-04-22 16:28 ` Eli Zaretskii
2019-04-22 16:44 ` Dmitry Gutov
2019-04-22 16:50 ` Eli Zaretskii
2019-04-22 17:05 ` Dmitry Gutov
2019-04-22 17:24 ` Eli Zaretskii
2019-04-22 21:03 ` Dmitry Gutov
2019-04-23 10:22 ` Eli Zaretskii
2019-04-23 11:39 ` Dmitry Gutov
2019-04-23 13:19 ` Eli Zaretskii
2019-04-22 16:49 ` Eli Zaretskii
2019-04-22 17:11 ` Dmitry Gutov
2019-04-22 17:26 ` Eli Zaretskii
2019-04-22 22:23 ` Dmitry Gutov
2019-04-23 6:00 ` Eli Zaretskii
2019-04-23 9:46 ` Philipp Stephani
2019-04-23 10:38 ` Eli Zaretskii
2019-04-23 10:44 ` Dmitry Gutov
2019-04-24 2:23 ` Richard Stallman
2019-04-22 17:12 ` Eli Zaretskii
2019-04-22 21:00 ` Dmitry Gutov
2019-04-21 22:14 ` Dmitry Gutov
2019-04-22 7:06 ` Eli Zaretskii
2019-04-21 22:12 ` Dmitry Gutov
2019-04-22 7:03 ` Eli Zaretskii
2019-04-22 11:46 ` Dmitry Gutov
2019-04-22 12:07 ` Eli Zaretskii
2019-04-22 12:58 ` Dmitry Gutov
2019-04-22 13:12 ` Eli Zaretskii
2019-04-22 13:58 ` Dmitry Gutov
2019-04-22 15:25 ` Eli Zaretskii
2019-04-22 15:41 ` Dmitry Gutov
2019-04-22 15:50 ` Eli Zaretskii
2019-04-22 16:00 ` Dmitry Gutov
2019-04-22 16:22 ` Eli Zaretskii
2019-04-22 19:55 ` Dmitry Gutov
2019-04-22 20:28 ` Eli Zaretskii
2019-04-23 11:52 ` Dmitry Gutov
2019-04-23 12:15 ` Eli Zaretskii
2019-04-23 12:37 ` yyoncho
2019-04-23 13:09 ` Eli Zaretskii
2019-04-23 13:27 ` yyoncho
2019-04-23 14:24 ` Eli Zaretskii
2019-04-23 12:37 ` Sébastien Chapuis
2019-04-23 13:10 ` Eli Zaretskii
2019-04-23 14:22 ` Dmitry Gutov
2019-04-23 14:40 ` Philipp Stephani
2019-04-23 15:09 ` Eli Zaretskii
2019-04-23 15:17 ` Eli Zaretskii
2019-04-23 15:36 ` yyoncho
2019-04-23 15:39 ` Eli Zaretskii
2019-04-23 15:43 ` yyoncho
2019-04-23 22:34 ` Dmitry Gutov
2019-04-24 6:20 ` Eli Zaretskii
2019-04-24 6:57 ` Dmitry Gutov
2019-04-24 7:28 ` Eli Zaretskii
2019-04-24 9:52 ` Dmitry Gutov
2019-04-23 14:58 ` Eli Zaretskii
2019-04-24 15:55 ` Dmitry Gutov
2019-04-24 16:21 ` Eli Zaretskii
2019-04-24 16:46 ` Dmitry Gutov
2019-04-24 17:06 ` Eli Zaretskii
2019-04-24 17:36 ` Dmitry Gutov
2019-04-24 17:43 ` Eli Zaretskii
2019-04-24 20:25 ` Dmitry Gutov
2019-04-25 10:44 ` Eli Zaretskii
2019-04-25 14:27 ` Dmitry Gutov
2020-08-22 23:28 ` Lars Ingebrigtsen
2020-08-23 5:50 ` Eli Zaretskii
2019-04-23 14:50 ` Andy Moreton
2019-04-23 15:03 ` Eli Zaretskii
2019-04-23 15:44 ` Andy Moreton
2019-04-22 11:36 ` Dmitry Gutov
2019-04-22 12:01 ` Eli Zaretskii
2019-04-22 13:11 ` Dmitry Gutov
2019-03-30 9:07 ` Eli Zaretskii
2019-04-22 18:20 ` Alex Gramiak
2019-04-22 18:27 ` Eli Zaretskii
2019-04-22 19:52 ` Alex Gramiak
2019-04-22 20:05 ` Dmitry Gutov
2019-04-23 3:06 ` Alex Gramiak
2019-04-23 11:44 ` Dmitry Gutov
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