GNU bug report logs - #2184
23.0.60; performance issue since CVS 2009-01-30

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: poppyer <at> gmail.com
To: emacs-pretest-bug <at> gnu.org
Subject: 23.0.60; performance issue since CVS 2009-01-30 
Date: Tue, 03 Feb 2009 20:25:52 +0800

Since CVS 2009-01-30, Emacs.app here becomes very slow, and CPU consuming,
especially for w3m (often freezes more than 30seconds with 100% CPU)

I try to trace what the issue is. And find that it only relates to the Emacs excutable:
"/Applications/Emacs.app/Contents/MacOS/Emacs"
If I replace it with the excutable of 2009-01-29, everything backs to normal.
(which means that lisp/site-lisp parts are no problem)

I notice that there are some changes in CVS/emacs/src 3 to 4 days ago,
but I am unable to trace/debug it further. Can you look at the changes to
see what might cause the issue? (or any advice for me to further debug it)

Cheers,
poppyer


In GNU Emacs 23.0.60.1 (i386-apple-darwin9.6.0, NS apple-appkit-949.43)
 of 2009-01-28 on neutron.local
Windowing system distributor `Apple', version 10.3.949
configured using `configure  '--with-ns''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: zh_CN.UTF-8
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  value of $XMODIFIERS: @im=fcitx
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Group

Minor modes in effect:
  erc-log-mode: t
  erc-list-mode: t
  erc-menu-mode: t
  erc-autojoin-mode: t
  erc-ring-mode: t
  erc-networks-mode: t
  erc-pcomplete-mode: t
  erc-track-mode: t
  erc-track-minor-mode: t
  erc-match-mode: t
  erc-button-mode: t
  erc-fill-mode: t
  erc-stamp-mode: t
  erc-netsplit-mode: t
  erc-irccontrols-mode: t
  erc-noncommands-mode: t
  erc-move-to-prompt-mode: t
  erc-readonly-mode: t
  gnus-undo-mode: t
  recentf-mode: t
  show-paren-mode: t
  cua-mode: t
  mouse-sel-mode: t
  xterm-mouse-mode: t
  global-hl-line-mode: t
  pinbar-mode: t
  shell-dirtrack-mode: t
  which-function-mode: t
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
t RET ESC 1 n n n n n n n n n n n n p p p p p p p p 
p p p p p p p n n n n n n n n n n n n n n n n n n n 
n n p p p p p p p p p p p p p p p p p n n n n n n n 
n n n n n n n n n n n n n n n n ESC 2 ESC 1 ESC o ESC 
o ESC o ESC o p p p p p p RET SPC q C-x o x f k SPC 
DEL DEL DEL DEL C-\ x f k SPC k t k SPC DEL DEL x f 
SPC k t k SPC . RET C-x o C-x 1 ESC < n n n n n n n 
n p RET C-x b t RET g k p SPC DEL g k l p SPC p y g 
l SPC DEL v q a DEL SPC k t k SPC . RET p SPC g k SPC 
i p k h SPC m q b SPC RET C-l ESC 1 ESC [ M SPC . 5 
ESC [ M # . 5 n n n C-x b t h RET ESC 1 ESC o i SPC 
x f v q SPC y i SPC w v r t SPC C-a C-e C-a C-e RET 
ESC 1 p p p p p p p p p n n n n n n C-x b t h RET : 
D RET ESC 1 ESC x d e s TAB c r TAB TAB ESC DEL r e 
p o TAB TAB r TAB RET

Recent messages:
Waiting for response from imap.gmail.com...done
Parsing authinfo file `~/.authinfo'.
imap: Plaintext authentication...
Opening nnimap server on gmail...done
Reading active file from gmail via nnimap...
nnimap: Checking mailboxes...done
Reading active file from news.motzarella.org via nntp...
Opening nntp server on news.motzarella.org...done
Checking new news...done
Making completion list... [3 times]

Message #12 received at 2184 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Adrian Robert <adrian.b.robert <at> gmail.com>
To: 2184 <at> debbugs.gnu.org
Cc: poppyer <poppyer <at> gmail.com>
Subject: Re: 23.0.60; performance issue since CVS 2009-01-30
Date: Wed, 4 Feb 2009 13:43:14 +0200

I have not noticed performance problems here but there have been  
significant changes from 01/28 through today 02/04 and it is possible  
there are problems under some usage conditions.  First, could you  
test again using current CVS (including 02/04 changes)?  Also, is  
there an easy way to obtain the 100% CPU usage cases in a mode that  
comes with emacs?  What OS X version are you on?

thanks.

Message #17 received at 2184 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: poppyer <poppyer <at> gmail.com>
To: Adrian Robert <adrian.b.robert <at> gmail.com>
Cc: 2184 <at> debbugs.gnu.org
Subject: Re: 23.0.60; performance issue since CVS 2009-01-30
Date: Wed, 04 Feb 2009 21:53:25 +0800

Adrian Robert <adrian.b.robert <at> gmail.com> writes:

> I have not noticed performance problems here but there have been
> significant changes from 01/28 through today 02/04 and it is possible
> there are problems under some usage conditions.  First, could you
> test again using current CVS (including 02/04 changes)?  Also, is
> there an easy way to obtain the 100% CPU usage cases in a mode that
> comes with emacs?  What OS X version are you on?

Yes, today 02-04 is the same, and I am using OSX 10.5.6.

I am sorry but I am unable to reproduce it in other simple setup.

However, we seem to trace down that the issue is about regular
expression matching, as also mention in:
http://lists.gnu.org/archive/html/emacs-devel/2009-02/msg00012.html, 
there are some clue about function "re-search-forward"

I profile in my w3m case, with exactly the same procedure here comes:

Function Name                                      Call Count Elapsed Time Average Time
====================== with 2009-02-04 Emacs executable =======================
regexp-opt-group                                    2668        2.5593199999  0.0009592653
re-search-forward                                   730         1.4294740000  0.0019581835
run-hooks                                           38          1.3881749999  0.0365309210
regexp-opt                                          162         0.8015100000  0.0049475925
regexp-quote                                        1650        0.0171659999  1.040...e-05
remove-text-properties                              506         0.0074000000  1.462...e-05
====================== with 2009-01-19 Emacs executable =======================
regexp-opt-group                                    2668        0.4568619999  0.0001712376
regexp-opt                                          162         0.1268280000  0.0007828888
re-search-forward                                   730         0.0308000000  4.219...e-05
run-hooks                                           37          0.029099      0.0007864594
run-at-time                                         41          0.0009150000  2.231...e-05
regexp-quote                                        1650        0.0008870000  5.375...e-07
remove-text-properties                              506         0.0007210000  1.424...e-06


Is there any specific changes in regular expression part in 2009-01-30
(not about lisp but the Emacs executable)?

>
> thanks.

Message #22 received at 2184 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Adrian Robert <adrian.b.robert <at> gmail.com>
To: poppyer <poppyer <at> gmail.com>
Cc: 2184 <at> debbugs.gnu.org
Subject: Re: 23.0.60; performance issue since CVS 2009-01-30
Date: Sat, 7 Feb 2009 13:02:41 +0200

This was a problem on all platforms and I believe it has now been  
fixed by a check-in 2009-02-07.  Please let me know, thanks!





On Feb 4, 2009, at 3:53 PM, poppyer wrote:

>
> Adrian Robert <adrian.b.robert <at> gmail.com> writes:
>
>> I have not noticed performance problems here but there have been
>> significant changes from 01/28 through today 02/04 and it is possible
>> there are problems under some usage conditions.  First, could you
>> test again using current CVS (including 02/04 changes)?  Also, is
>> there an easy way to obtain the 100% CPU usage cases in a mode that
>> comes with emacs?  What OS X version are you on?
>
> Yes, today 02-04 is the same, and I am using OSX 10.5.6.
>
> I am sorry but I am unable to reproduce it in other simple setup.
>
> However, we seem to trace down that the issue is about regular
> expression matching, as also mention in:
> http://lists.gnu.org/archive/html/emacs-devel/2009-02/msg00012.html,
> there are some clue about function "re-search-forward"

OK, thanks.  There were no OS X-specific changes in the RE area, and  
it sounds like other platforms are experiencing similar issues.

Message #27 received at 2184 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: poppyer <poppyer <at> gmail.com>
To: Adrian Robert <adrian.b.robert <at> gmail.com>
Cc: 2184 <at> debbugs.gnu.org
Subject: Re: 23.0.60; performance issue since CVS 2009-01-30
Date: Sat, 07 Feb 2009 19:55:49 +0800

Adrian Robert <adrian.b.robert <at> gmail.com> writes:

> This was a problem on all platforms and I believe it has now been
> fixed by a check-in 2009-02-07.  Please let me know, thanks!

Yes, confirmed issue resolved here.
Good job and thanks.

poppyer

>
>
>
>
>
> On Feb 4, 2009, at 3:53 PM, poppyer wrote:
>
>>
>> Adrian Robert <adrian.b.robert <at> gmail.com> writes:
>>
>>> I have not noticed performance problems here but there have been
>>> significant changes from 01/28 through today 02/04 and it is possible
>>> there are problems under some usage conditions.  First, could you
>>> test again using current CVS (including 02/04 changes)?  Also, is
>>> there an easy way to obtain the 100% CPU usage cases in a mode that
>>> comes with emacs?  What OS X version are you on?
>>
>> Yes, today 02-04 is the same, and I am using OSX 10.5.6.
>>
>> I am sorry but I am unable to reproduce it in other simple setup.
>>
>> However, we seem to trace down that the issue is about regular
>> expression matching, as also mention in:
>> http://lists.gnu.org/archive/html/emacs-devel/2009-02/msg00012.html,
>> there are some clue about function "re-search-forward"
>
> OK, thanks.  There were no OS X-specific changes in the RE area, and
> it sounds like other platforms are experiencing similar issues.

Message #32 received at 2184-done <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Adrian Robert <adrian.b.robert <at> gmail.com>
To: 2184-done <at> debbugs.gnu.org
Subject: Re: 23.0.60; performance issue since CVS 2009-01-30
Date: Sun, 8 Feb 2009 13:11:45 +0200

Closing, reporter confirms fixed.

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