GNU bug report logs -
#19776
25.0.50; HTML rendering is very slow
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Reported by: rms <at> gnu.org
Date: Wed, 4 Feb 2015 23:04:02 UTC
Severity: minor
Merged with 22846
Found in versions 25.0.50, 25.0.91
Fixed in version 29.1
Done: Lars Ingebrigtsen <larsi <at> gnus.org>
Bug is archived. No further changes may be made.
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Toggle the display of automated, internal messages from the tracker.
Report forwarded
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bug-gnu-emacs <at> gnu.org:
bug#19776; Package
emacs.
(Wed, 04 Feb 2015 23:04:02 GMT)
Full text and
rfc822 format available.
Acknowledgement sent
to
rms <at> gnu.org:
New bug report received and forwarded. Copy sent to
bug-gnu-emacs <at> gnu.org.
(Wed, 04 Feb 2015 23:04:02 GMT)
Full text and
rfc822 format available.
Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
The automatic HTML rendering of the following message takes several
seconds on this X60 which for most things is blindingly fast.
Since there is no indication on the screen of what is happening,
I think that I failed to type a command, and type it again.
It needs to be sped up, but in the short term it needs to display
"Rendering html..." in the echo area.
Date: Tue, 3 Feb 2015 17:34:46 -0500 (EST)
From: The Nation Magazine <emails <at> emails.thenation.com>
Message-ID: <20150203223446.3769712.187000 <at> sailthru.com>
Subject: Anti-Vaxxers and Our Political Craziness Gap, Plus: Emotional Labor
at McDonald's and the Super Bowl Conspiracy Theory
Content-Type: multipart/alternative;
boundary="----=_Part_52339185_374501655.1423002886144"
------=_Part_52339185_374501655.1423002886144
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: quoted-printable
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.=
w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns=3D"http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8" />
<meta name=3D"viewport" content=3D"width=3Ddevice-width, initial-scale=3D1.=
0"/>
<title>Email Nation</title>
<style type=3D"text/css">
*{margin-top:0;margin-bottom:0;padding:0;border:0;line-height:normal;outlin=
e:0;list-style:none;font-family:Arial,Helvetica,sans-serif;-webkit-text-siz=
e-adjust:none}body{margin-top:0!important;margin-bottom:0!important;padding=
-top:0!important;padding-bottom:0!important;width:100%!important;-webkit-te=
xt-size-adjust:100%!important;-ms-text-size-adjust:100%!important;-webkit-f=
ont-smoothing:antialiased!important}img{border:0!important;outline:none!imp=
ortant}
table{border-collapse:collapse;mso-table-lspace:0;mso-table-rspace:0}
td{border-collapse:collapse;mso-line-height-rule:exactly}
a{border-collapse:collapse;mso-line-height-rule:exactly}
span{border-collapse:collapse;mso-line-height-rule:exactly}.ExternalClass=
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*{line-height:100%}.ExternalClass,.ExternalClass p,.ExternalClass span,.Ext=
ernalClass font,.ExternalClass td,.ExternalClass a,.ExternalClass=20
div{line-height:100%}.mob=20
a{color:#000;text-decoration:none}.footer_text1=20
a{color:#000;text-decoration:none}
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td[class=3Daside]{width:15px!important}
td[class=3Dspc_height]{height:15px!important}
td[class=3Dspc_20]{height:20px!important}
td[class=3Dhide]{display:none!important}
img[class=3Dhide]{display:none!important}
span[class=3Dhide]{display:none!important}
table[class=3Dhide]{display:none!important}
td[class=3Dtext]{text-align:center!important}
td[class=3Dpad_top]{padding-top:20px!important}
img[class=3Dful_width]{width:100%!important;height:auto!important}
td[class=3Dpad_both]{padding-left:45px!important;padding-right:45px!importa=
nt}
table[class=3Dwid_160]{width:160px!important}
td[class=3Dmob_width1]{width:158px!important}
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td[class=3Dspc_30]{height:30px!important}
td[class=3Dconnect]{padding-left:15px!important;padding-right:15px!importan=
t;font-size:20px!important;line-height:25px!important}td[class=3Dfooter_tex=
t1]{padding-left:12px!important;padding-right:12px!important}}
</style>
</head>
<body marginwidth=3D"0" marginheight=3D"0" style=3D"margin-top: 0;=20
margin-bottom: 0; padding-top: 0; padding-bottom: 0; width: 100% !importa=
nt;-webkit-text-size-adjust: 100%; -ms-text-size-adjust: 100%; background-c=
olor:#fffffe; -webkit-font-smoothing: antialiased; " offset=3D"0" topmargin=
=3D"0" leftmargin=3D"0" bgcolor=3D"#fffffe">
<table width=3D"100%" border=3D"0" cellspacing=3D"0" cellpadding=3D"0" alig=
n=3D"center" bgcolor=3D"#fffffe">
<!--=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D PREHEADER & MASTHEAD =3D=3D=3D=3D=
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<tr>
<td>
<table width=3D"100%" cellpadding=3D"0" cellspacing=3D"0" align=3D"center">
<tr><td height=3D"5" valign=3D"top" align=3D"center" style=3D"font-family: =
arial, san-serif; font-size: 1px; color:#fffffe;line-height:5px;">A minimal=
ly responsible Republican Party would not pander to this sort of thing. But=
that, of course, is not what we have.</td></tr>
<tr><td valign=3D"top" align=3D"center" style=3D"font-family: arial, san-se=
rif; font-size: 10px; color:#666666;">Having trouble reading this email? <a=
href=3D"http://link.thenation.com/view/53481ca417ffdeb835293bf128sq8.40ag/=
302eeb0d" target=3D"_blank" style=3D"color: #FF0E00 !important;">View it on=
the Web.</a></td></tr>
<tr><td height=3D"5" style=3D"line-height:1px;font-size:1px;"> </td></=
tr>
</table>
</td>
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=3D=3D=3D=3D-->
<tr>
<td>
<table width=3D"283" border=3D"0" cellspacing=3D"0" cellpadding=3D"0" align=
=3D"center" class=3D"main_table">
<tr>
<td width=3D"20" class=3D"aside"> </td>
<td>
<table width=3D"100%" border=3D"0" cellspacing=3D"0" cellpadding=3D"0" alig=
n=3D"center">
<tr>
<td height=3D"12" style=3D"line-height:0px;font-size:0px;" > </td>
</tr>
<tr>
<td align=3D"center"><a href=3D"http://link.thenation.com/53481ca417ffdeb83=
5293bf128sq8.40ag/Tc2PvcTjHfFPa1KfB3b56" target=3D"_blank"><img src=3D"http=
://email-media.s3.amazonaws.com/TheNation/EmailNation/logo_242x35.png" alt=
=3D"" width=3D"242" height=3D"35" style=3D"display:block;" border=3D"0" /><=
/a></td>
</tr>
<tr>
<td height=3D"7" style=3D"line-height:0px;font-size:0px;" > </td>
</tr>
<tr>
<td align=3D"center" class=3D"text" style=3D"font-family:Arial,sans-serif;c=
olor:#000001;font-size:15px;line-height:18px;text-decoration:none;font-weig=
ht:bold;">Tuesday, February 03, 2015</td>
</tr>
<tr>
<td height=3D"15" style=3D"line-height:0px;font-size:0px;" > </td>
</tr>
</table>
</td>
<td width=3D"20" class=3D"aside"> </td>
</tr>
</table>
</td>
</tr>
<tr>
<td bgcolor=3D"#d25340" style=3D"line-height:0px;font-size:0px;" height=3D"=
1"><img src=3D"http://email-media.s3.amazonaws.com/TheNation/EmailNation/sp=
acer1x1.gif" width=3D"1" height=3D"1" style=3D"display:block;" border=3D"0"=
/></td>
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<table width=3D"606" border=3D"0" cellspacing=3D"0" cellpadding=3D"0" align=
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<tr>
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<td bgcolor=3D"#c2c2c2" style=3D"line-height:0px;font-size:0px;" width=3D"1=
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<td>
<table width=3D"100%" border=3D"0" cellspacing=3D"0" cellpadding=3D"0" alig=
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n=3D"center">
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<tr>
<td><a href=3D"http://link.thenation.com/53481ca417ffdeb835293bf128sq8.40ag=
/VNEg6cPo1o7muBpxAfac9" target=3D"_blank"><img src=3D"http://www.thenation.=
com/sites/default/files/vaccine_rtr_img.jpg" alt=3D"" width=3D"335" class=
=3D"ful_width" style=3D"display:block;" border=3D"0" /></a></td>
</tr>
<tr>
<td height=3D"20" style=3D"line-height:0px;font-size:0px;" > </td>
</tr>
</table>
<table width=3D"220" border=3D"0" cellspacing=3D"0" cellpadding=3D"0" align=
=3D"right" class=3D"wrapper">
<tr>
<td align=3D"left"><a href=3D"http://link.thenation.com/53481ca417ffdeb8352=
93bf128sq8.40ag/VNEg6cPo1o7muBpxAfac9" target=3D"_blank" style=3D"font-fami=
ly:Georgia, 'Times New Roman', Times, serif;color:#000001;font-size:18px;li=
ne-height:22px;text-decoration:none;font-weight:bold;">The GOP=E2=80=99s Em=
brace of Anti-Vaxxers Reveals the Craziness Gap in American Politics</a></t=
d>
</tr>
<tr>
<td height=3D"5" style=3D"line-height:0px;font-size:0px;" > </td>
</tr>
<tr>
<td style=3D"font-family:Tahoma, sans-serif;color:#496a8b;font-size:15px;li=
ne-height:18px;text-decoration:none;font-weight:bold;" align=3D"left">by Mi=
chelle Goldberg </td>
</tr>
<tr>
<td height=3D"25" style=3D"line-height:0px;font-size:0px;" > </td>
</tr>
<tr>
<td align=3D"left" width=3D"220" height=3D"40">
<div><!--[if mso]>
<v:roundrect xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:w=3D"urn:schem=
as-microsoft-com:office:word" href=3D"http://www.thenation.com/blog/196857/=
gops-embrace-anti-vaxxers-reveals-craziness-gap-american-politics" style=3D=
"height:40px;v-text-anchor:middle;width:220px;" arcsize=3D"15%" stroke=3D"f=
" fill=3D"t">
<v:fill type=3D"tile" src=3D"http://email-media.s3.amazonaws.com/TheNation/=
EmailNation/button_feature_220x40.jpg" color=3D"#fa1b20" />
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<center style=3D"color:#ffffff;font-family:sans-serif;font-size:13px;font-w=
eight:bold;">Read More >></center>
</v:roundrect>
<![endif]--><a href=3D"http://link.thenation.com/53481ca417ffdeb835293bf128=
sq8.40ag/VNEg6cPo1o7muBpxAfac9"
style=3D"background-color:#fa1b20;background-image:url(http://email-media.s=
3.amazonaws.com/TheNation/EmailNation/button_feature_220x40.jpg);border-rad=
ius:6px;color:#ffffff;display:inline-block;font-family:Tahoma,Geneva,Arial,=
sans-serif;font-size:18px;font-weight:bold;line-height:40px;text-align:cent=
er;text-decoration:none;width:220px;-webkit-text-size-adjust:none;mso-hide:=
all;font-style:italic;">Read »</a></div>
</td>
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<td height=3D"15" style=3D"line-height:0px;font-size:0px;" > </td>
</tr>
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<td bgcolor=3D"#d25340" style=3D"line-height:0px;font-size:0px;" height=3D"=
1"><img src=3D"http://email-media.s3.amazonaws.com/TheNation/EmailNation/sp=
acer1x1.gif" width=3D"1" height=3D"1" style=3D"display:block;" border=3D"0"=
/></td>
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ass=3D"ful_width" style=3D"display:block;" border=3D"0" /></a>--><a href=3D=
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9eecc42f000004/546f942f5f1d5b0a2f2c09ab/67d33d29"><img src=3D"http://link.t=
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<td style=3D"font-family:Tahoma, sans-serif;color:#496a8b;font-size:15px;li=
ne-height:18px;text-decoration:none;font-weight:bold;" align=3D"left">by Br=
yce Covert </td>
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eight:bold;">Read »</center>
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<![endif]--><a href=3D"http://link.thenation.com/53481ca417ffdeb835293bf128=
sq8.40ag/VNDUasPo4IPwqPeTAa4cb"
style=3D"background-color:#fa1b20;background-image:url(http://email-media.s=
3.amazonaws.com/TheNation/EmailNation/button_article_278x40.jpg);border-rad=
ius:6px;color:#ffffff;display:inline-block;font-family:Tahoma,Geneva,Arial,=
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ly:Georgia, 'Times New Roman', Times, serif;color:#000001;font-size:18px;li=
ne-height:22px;text-decoration:none;font-weight:bold;" >Some Enchanted Stan=
dards</a></td>
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ne-height:18px;text-decoration:none;font-weight:bold;" align=3D"left">by Da=
vid Hajdu </td>
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all;font-style:italic;">Read »</a></div>
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<td align=3D"left"><a href=3D"http://link.thenation.com/53481ca417ffdeb8352=
93bf128sq8.40ag/VNEMpMPooQCe9qdUAd3c2" target=3D"_blank" style=3D"font-fami=
ly:Georgia, 'Times New Roman', Times, serif;color:#000001;font-size:18px;li=
ne-height:22px;text-decoration:none;font-weight:bold;" >What to Do Now That=
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<td style=3D"font-family:Tahoma, sans-serif;color:#496a8b;font-size:15px;li=
ne-height:18px;text-decoration:none;font-weight:bold;" align=3D"left">by To=
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ne-height:20px;text-decoration:none;font-weight:bold;">Stop Watching Us</td=
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ne-height:16px;text-decoration:none;" class=3D"mob">The Stop Watching Us Ra=
lly Against Mass Surveillance being held in Washington, DC, this Saturday, =
October 26, the twelfth anniversary of the Patriot Act, is expected to be t=
he largest privacy protest in the history of the republic. Formed in June 2=
013, the StopWatching.us coalition comprises more than 100 public advocacy =
organizations from across the political spectrum demanding that Congress in=
vestigate the full extent of the NSA's spying programs. <span class=3D"hide=
" style=3D"font-family:Tahoma, sans-serif;color:#000001;font-size:13px;line=
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ation:underline;">here</a>.</span></td>
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------=_Part_52339185_374501655.1423002886144--
In GNU Emacs 25.0.50.1 (i686-pc-linux-gnu, GTK+ Version 2.24.10)
of 2015-02-01 on rms
System Description: Trisquel GNU/Linux 6.0.1, Toutatis
Configured using:
`configure 'CFLAGS=-g3 -O0''
Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND GPM DBUS GCONF GSETTINGS NOTIFY
LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
Important settings:
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix
Major mode: RMAIL
Minor modes in effect:
shell-dirtrack-mode: t
gpm-mouse-mode: t
tooltip-mode: t
global-eldoc-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
buffer-read-only: t
line-number-mode: t
abbrev-mode: t
Recent messages:
Wrote /home/rms/outgoing/out-35
Saving file /home/rms/outgoing/out-35...
Wrote /home/rms/outgoing/out-35
Expunging deleted messages...done
Char: TAB (9, #o11, #x9) point=150 of 52916 (0%) column=0
Mark set [2 times]
Saved text until "rt_52339185_374501655.1423002886144--
"
Load-path shadows:
None found.
Features:
(shadow emacsbug rmailout shell pcomplete grep compile comint
ansi-color ring url-util url-parse auth-source cl-macs eieio byte-opt
gv bytecomp byte-compile cl-extra seq cconv eieio-core cl-generic
gnus-util password-cache url-vars shr-color color shr dom cl-loaddefs
cl-lib subr-x pcase browse-url mailalias rmailsum battery qp rmailmm
message sendmail format-spec rfc822 mml easymenu mml-sec mm-decode
mm-bodies mm-encode mailabbrev gmm-utils mailheader mail-parse rfc2231
rmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils dired
t-mouse package epg-config view time-date paren cus-start cus-load
advice help-fns tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel x-win x-dnd tool-bar dnd fontset image
regexp-opt fringe tabulated-list newcomment elisp-mode lisp-mode
prog-mode register page menu-bar rfn-eshadow timer select scroll-bar
mouse jit-lock font-lock syntax facemenu font-core frame cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev
minibuffer cl-preloaded nadvice loaddefs button faces cus-face
macroexp files text-properties overlay sha1 md5 base64 format env
code-pages mule custom widget hashtable-print-readable backquote
make-network-process dbusbind gfilenotify dynamic-setting
system-font-setting font-render-setting move-toolbar gtk x-toolkit x
multi-tty emacs)
Memory information:
((conses 8 273262 23081)
(symbols 24 22796 0)
(miscs 20 634 1310)
(strings 16 30913 4808)
(string-bytes 1 1005054)
(vectors 8 14300)
(vector-slots 4 415483 37376)
(floats 8 295 462)
(intervals 28 52132 83)
(buffers 520 27)
(heap 1024 9349 544))
[[[ To any NSA and FBI agents reading my email: please consider ]]]
[[[ whether defending the US Constitution against all enemies, ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]
--
Dr Richard Stallman
President, Free Software Foundation
51 Franklin St
Boston MA 02110
USA
www.fsf.org www.gnu.org
Skype: No way! See stallman.org/skype.html.
Information forwarded
to
bug-gnu-emacs <at> gnu.org:
bug#19776; Package
emacs.
(Thu, 05 Feb 2015 11:43:01 GMT)
Full text and
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Message #8 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Richard Stallman <rms <at> gnu.org> writes:
> The automatic HTML rendering of the following message takes several
> seconds on this X60 which for most things is blindingly fast.
FWIW, here's the elp-results on my machine (after instrumenting the
package shr, and calling shr-render-buffer) :
shr-descend 6227 408.78522387 0.0656472175
shr-tag-table 1062 189.46034310 0.1783995697
shr-tag-table-1 1062 189.33667913 0.1782831253
shr-make-table 3186 187.52006959 0.0588575234
shr-make-table-1 1070 164.06574762 0.1533324744
shr-render-td 3428 163.98280975 0.0478362922
shr-render-buffer 1 28.734523319 28.734523319
shr-insert-document 1 28.712268988 28.712268988
shr-tag-body 1 28.690722764 28.690722764
shr-insert-table 1062 0.8013559019 0.0007545724
shr-insert 4126 0.283103186 6.861...e-05
shr-tag-a 822 0.2324357269 0.0002827685
shr-column-specs 1062 0.1266108010 0.0001192192
shr-tag-div 198 0.0957929849 0.0004838029
shr-max-columns 2124 0.0947569080 4.461...e-05
shr-colorize-region 634 0.075634319 0.0001192970
shr-parse-style 548 0.0700457249 0.0001278206
shr-color-check 141 0.0599092470 0.0004248882
shr-tag-img 333 0.058440363 0.0001754965
shr-color-visible 141 0.0464957430 0.0003297570
shr-urlify 212 0.0396780100 0.0001871604
shr-count 5966 0.0346115289 5.801...e-06
shr-table-widths 1062 0.0337347569 3.176...e-05
shr-add-font 3462 0.0260796149 7.533...e-06
shr-find-fill-point 494 0.0245121429 4.961...e-05
shr-indent 10019 0.0231243120 2.308...e-06
shr-remove-trailing-whitespace 1 0.02058152 0.02058152
shr-pro-rate-columns 1062 0.0123682060 1.164...e-05
shr-insert-table-ruler 4045 0.0103226100 2.551...e-06
shr-ensure-paragraph 1064 0.0096426120 9.062...e-06
shr-color->hexadecimal 282 0.0084433179 2.994...e-05
shr-fold-text 23 0.0077441709 0.0003367030
shr-ensure-newline 396 0.0067178849 1.696...e-05
shr-expand-url 545 0.0023009930 4.222...e-06
shr-tag-br 102 0.002192799 2.149...e-05
shr-tag-comment 289 0.0007590249 2.626...e-06
shr-tag-title 1 0.00071629 0.00071629
shr-heading 1 0.000702604 0.000702604
shr-encode-url 46 0.0006519919 1.417...e-05
shr-fontize-dom 1 0.000606771 0.000606771
shr-tag-span 9 0.000584241 6.491...e-05
shr-previous-newline-padding-width 126 0.0004090820 3.246...e-06
shr-image-displayer 23 8.367...e-05 3.638...e-06
shr-tag-style 1 2.438e-06 2.438e-06
> Since there is no indication on the screen of what is happening,
> I think that I failed to type a command, and type it again.
>
> It needs to be sped up, but in the short term it needs to display
> "Rendering html..." in the echo area.
A patch is attached but I don't know if this is the right place for it
(shr-insert-document).
modified lisp/net/shr.el
@@ -208,7 +208,8 @@ (defun shr-insert-document (dom)
(shr-depth 0)
(shr-warning nil)
(shr-internal-width (or shr-width (1- (window-width)))))
- (shr-descend dom)
+ (with-temp-message "Rendering HTML..."
+ (shr-descend dom))
(shr-remove-trailing-whitespace start (point))
(when shr-warning
(message "%s" shr-warning))))
--
Nicolas
Information forwarded
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bug-gnu-emacs <at> gnu.org:
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emacs.
(Thu, 05 Feb 2015 16:15:02 GMT)
Full text and
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Message #11 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> From: Nicolas Richard <theonewiththeevillook <at> yahoo.fr>
> Date: Thu, 05 Feb 2015 12:42:21 +0100
> Cc: 19776 <at> debbugs.gnu.org
>
> modified lisp/net/shr.el
> @@ -208,7 +208,8 @@ (defun shr-insert-document (dom)
> (shr-depth 0)
> (shr-warning nil)
> (shr-internal-width (or shr-width (1- (window-width)))))
> - (shr-descend dom)
> + (with-temp-message "Rendering HTML..."
> + (shr-descend dom))
> (shr-remove-trailing-whitespace start (point))
> (when shr-warning
> (message "%s" shr-warning))))
>
I'm not sure it's right for a library to display such messages. I
think the application (in this case, Rmail) should do that.
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(Fri, 25 Dec 2015 22:35:02 GMT)
Full text and
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Message #14 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Richard Stallman <rms <at> gnu.org> writes:
> The automatic HTML rendering of the following message takes several
> seconds on this X60 which for most things is blindingly fast.
> Since there is no indication on the screen of what is happening,
> I think that I failed to type a command, and type it again.
It takes a quarter second on my laptop now. Is this still slow for you?
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
Information forwarded
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(Sat, 26 Dec 2015 06:15:04 GMT)
Full text and
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Message #17 received at 19776 <at> debbugs.gnu.org (full text, mbox):
[[[ To any NSA and FBI agents reading my email: please consider ]]]
[[[ whether defending the US Constitution against all enemies, ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]
> > The automatic HTML rendering of the following message takes several
> > seconds on this X60 which for most things is blindingly fast.
> > Since there is no indication on the screen of what is happening,
> > I think that I failed to type a command, and type it again.
> It takes a quarter second on my laptop now. Is this still slow for you?
It takes around 5 seconds now -- still enough to lead a user
to think it is broken. If it is going to take this long,
it should show echo area messages about process.
--
Dr Richard Stallman
President, Free Software Foundation (gnu.org, fsf.org)
Internet Hall-of-Famer (internethalloffame.org)
Skype: No way! See stallman.org/skype.html.
Information forwarded
to
bug-gnu-emacs <at> gnu.org:
bug#19776; Package
emacs.
(Sun, 15 Apr 2018 21:50:02 GMT)
Full text and
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Message #20 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Richard Stallman <rms <at> gnu.org> writes:
> It takes around 5 seconds now -- still enough to lead a user
> to think it is broken. If it is going to take this long,
> it should show echo area messages about process.
If we had a form like
(with-delayed-message (1 "Rendering html...")
... all the code ...)
then we'd be able to display a message if the code took longer than 1
second. We don't have that, do we?
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
Forcibly Merged 19776 22846.
Request was from
Lars Ingebrigtsen <larsi <at> gnus.org>
to
control <at> debbugs.gnu.org.
(Sun, 15 Apr 2018 21:51:01 GMT)
Full text and
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Information forwarded
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bug-gnu-emacs <at> gnu.org:
bug#19776; Package
emacs.
(Sun, 15 Apr 2018 22:01:01 GMT)
Full text and
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Message #25 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen <larsi <at> gnus.org> writes:
> Richard Stallman <rms <at> gnu.org> writes:
>
>> It takes around 5 seconds now -- still enough to lead a user
>> to think it is broken. If it is going to take this long,
>> it should show echo area messages about process.
>
> If we had a form like
>
> (with-delayed-message (1 "Rendering html...")
> ... all the code ...)
>
> then we'd be able to display a message if the code took longer than 1
> second. We don't have that, do we?
Oh, I asked this before, and the answer is "nope, not at all".
The problem is that it can't be done with normal timers, since "all the
code" may be pure Elisp and never yield. For that reason, it can't be
done with the new thread support, either.
So it would require some C-level magic.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
Information forwarded
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bug-gnu-emacs <at> gnu.org:
bug#19776; Package
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(Sat, 23 Oct 2021 00:01:01 GMT)
Full text and
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Message #28 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen <larsi <at> gnus.org> writes:
> Lars Ingebrigtsen <larsi <at> gnus.org> writes:
>
>> Richard Stallman <rms <at> gnu.org> writes:
>>
>>> It takes around 5 seconds now -- still enough to lead a user
>>> to think it is broken. If it is going to take this long,
>>> it should show echo area messages about process.
>>
>> If we had a form like
>>
>> (with-delayed-message (1 "Rendering html...")
>> ... all the code ...)
>>
>> then we'd be able to display a message if the code took longer than 1
>> second. We don't have that, do we?
>
> Oh, I asked this before, and the answer is "nope, not at all".
>
> The problem is that it can't be done with normal timers, since "all the
> code" may be pure Elisp and never yield. For that reason, it can't be
> done with the new thread support, either.
>
> So it would require some C-level magic.
I guess we can't do this for the C-level DEFUN's (without massive
changes), but we might be able to check some timer before executing a
Lisp function or something. However, wouldn't such a new check risk
slowing Emacs down as a whole?
IOW, I ask if what you ask for is a little bit "too nice", and if we
shouldn't just fix the problematic ELisp code itself to use a progress
reporter or something to that effect.
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(Sat, 23 Oct 2021 07:29:01 GMT)
Full text and
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Message #31 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> From: Stefan Kangas <stefan <at> marxist.se>
> Date: Fri, 22 Oct 2021 16:59:55 -0700
> Cc: Richard Stallman <rms <at> gnu.org>, 19776 <at> debbugs.gnu.org
>
> >> then we'd be able to display a message if the code took longer than 1
> >> second. We don't have that, do we?
> >
> > Oh, I asked this before, and the answer is "nope, not at all".
> >
> > The problem is that it can't be done with normal timers, since "all the
> > code" may be pure Elisp and never yield. For that reason, it can't be
> > done with the new thread support, either.
> >
> > So it would require some C-level magic.
>
> I guess we can't do this for the C-level DEFUN's (without massive
> changes), but we might be able to check some timer before executing a
> Lisp function or something. However, wouldn't such a new check risk
> slowing Emacs down as a whole?
Did someone consider using atimers for this purpose? See atimer.c.
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(Sun, 24 Oct 2021 12:44:02 GMT)
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Message #34 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Eli Zaretskii <eliz <at> gnu.org> writes:
> Did someone consider using atimers for this purpose? See atimer.c.
Oh, that looks promising. I guess we can't run Lisp code from an
atimer? But then again, we wouldn't need to -- with a thing like
(with-delayed-message 2 "Rendering HTML..."
(do-the-hthml-rendering))
the message would be precomposed, so we'd just need to display it in the
echo area?
I guess with-delayed-message would have to be implemented in C, since
the atimers aren't exposed from Lisp, but it should be pretty trivial
anyway.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
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(Sun, 24 Oct 2021 14:06:02 GMT)
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Message #37 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Cc: Stefan Kangas <stefan <at> marxist.se>, rms <at> gnu.org, 19776 <at> debbugs.gnu.org
> Date: Sun, 24 Oct 2021 14:43:41 +0200
>
> Eli Zaretskii <eliz <at> gnu.org> writes:
>
> > Did someone consider using atimers for this purpose? See atimer.c.
>
> Oh, that looks promising. I guess we can't run Lisp code from an
> atimer? But then again, we wouldn't need to -- with a thing like
>
> (with-delayed-message 2 "Rendering HTML..."
> (do-the-hthml-rendering))
>
> the message would be precomposed, so we'd just need to display it in the
> echo area?
Yes. And Fmessage is implemented in C anyway.
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(Sun, 24 Oct 2021 14:26:01 GMT)
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Message #40 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Eli Zaretskii <eliz <at> gnu.org> writes:
>> (with-delayed-message 2 "Rendering HTML..."
>> (do-the-hthml-rendering))
>>
>> the message would be precomposed, so we'd just need to display it in the
>> echo area?
>
> Yes. And Fmessage is implemented in C anyway.
Right. I was more thinking of whether to evaluate the text form first
or when displaying it. I.e.,
(with-delayed-message 2 (format "This is taking a long time, %s" (user-full-name))
...
so this form will have to evaluate that immediately (before starting the
body), but display the results when the atimer runs out.
I'll have a crack at implementing this and see how it goes...
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Message #43 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen <larsi <at> gnus.org> writes:
> I'll have a crack at implementing this and see how it goes...
I've now implemented the special form, and it works fine interpreted.
But I'm having problems with the byte compilation.
So I've done a
(byte-defop-compiler-1 with-delayed-message)
and I think I understand that it wants to
(byte-compile-form (nth 1 form))
(byte-compile-form (nth 2 form))
(byte-compile-body-do-effect (cdr (cdr (cdr form))))
But this would be the first special form that doesn't have a byte op
code, probably? Is that allowed? I couldn't find any other examples of
that being a thing.
I may well be missing something.
But if that's the case, and we don't want to use a byte op for this,
then we'd have to make the special form into a normal macro, and then
create two helper functions (to start and stop the atimer in
question)... which is perhaps others have done kinda similar things
this way before.
But that's kinda meh. Am I missing something, and it's easy to write
the byte-compile-with-delayed-message function without a byte op? Or
should we use a byte op?
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Message #46 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Cc: stefan <at> marxist.se, rms <at> gnu.org, 19776 <at> debbugs.gnu.org
> Date: Sun, 24 Oct 2021 18:22:27 +0200
>
> I've now implemented the special form, and it works fine interpreted.
> But I'm having problems with the byte compilation.
>
> So I've done a
>
> (byte-defop-compiler-1 with-delayed-message)
>
> and I think I understand that it wants to
>
> (byte-compile-form (nth 1 form))
> (byte-compile-form (nth 2 form))
> (byte-compile-body-do-effect (cdr (cdr (cdr form))))
>
> But this would be the first special form that doesn't have a byte op
> code, probably? Is that allowed? I couldn't find any other examples of
> that being a thing.
>
> I may well be missing something.
>
> But if that's the case, and we don't want to use a byte op for this,
> then we'd have to make the special form into a normal macro, and then
> create two helper functions (to start and stop the atimer in
> question)... which is perhaps others have done kinda similar things
> this way before.
>
> But that's kinda meh. Am I missing something, and it's easy to write
> the byte-compile-with-delayed-message function without a byte op? Or
> should we use a byte op?
Stefan, any words of wisdom here?
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Message #49 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> But this would be the first special form that doesn't have a byte op
> code, probably? Is that allowed? I couldn't find any other examples of
> that being a thing.
You don't need a new byte-code, but I'd strongly advise against using
a new special form. It'll be much simpler to define it as a macro +
a function, where the macro turns
(with-delayed-message MSG BODY)
into
(funcall-with-delayed-message MSG (lambda () BODY))
-- Stefan
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Message #52 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Stefan Monnier <monnier <at> iro.umontreal.ca> writes:
> You don't need a new byte-code, but I'd strongly advise against using
> a new special form. It'll be much simpler to define it as a macro +
> a function, where the macro turns
>
> (with-delayed-message MSG BODY)
>
> into
>
> (funcall-with-delayed-message MSG (lambda () BODY))
Ah, yes indeed. That'll simplify things enormously; thanks.
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Message #55 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Stefan Monnier <monnier <at> iro.umontreal.ca> writes:
> You don't need a new byte-code, but I'd strongly advise against using
> a new special form. It'll be much simpler to define it as a macro +
> a function, where the macro turns
>
> (with-delayed-message MSG BODY)
>
> into
>
> (funcall-with-delayed-message MSG (lambda () BODY))
I've now implemented this... but testing this with a busy loop shows
that the atimer doesn't fire (or at least that the callback doesn't get
called) in all situations.
If I move the mouse pointer, for instance, then it's called. If I don't
do anything, and eval this:
(with-delayed-message 0.5 "Yes"
(dotimes (i 1000000000)
(+ i 2)))
the atimer callback isn't called. Anybody know what's up with that?
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Message #58 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen <larsi <at> gnus.org> writes:
> If I move the mouse pointer, for instance, then it's called.
(If I hit the keyboard, it's called, too, so the input system seems to
be causing the atimers to be triggered?)
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Message #61 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Cc: Eli Zaretskii <eliz <at> gnu.org>, stefan <at> marxist.se, rms <at> gnu.org,
> 19776 <at> debbugs.gnu.org
> Date: Sun, 24 Oct 2021 21:10:57 +0200
>
> I've now implemented this... but testing this with a busy loop shows
> that the atimer doesn't fire (or at least that the callback doesn't get
> called) in all situations.
>
> If I move the mouse pointer, for instance, then it's called. If I don't
> do anything, and eval this:
>
> (with-delayed-message 0.5 "Yes"
> (dotimes (i 1000000000)
> (+ i 2)))
>
> the atimer callback isn't called. Anybody know what's up with that?
When the timer expires, it delivers a signal, but the signal handler
only sets a flag. The flag is checked when we call maybe_quit, which
calls do_pending_atimers. So a Lisp program that hogs the CPU, and
never calls any function that calls maybe_quit, will indeed block
atimers. However, this is rare for real-life Lisp programs, because
several core primitives call maybe_quit from time to time.
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Message #64 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Eli Zaretskii <eliz <at> gnu.org> writes:
> When the timer expires, it delivers a signal, but the signal handler
> only sets a flag. The flag is checked when we call maybe_quit, which
> calls do_pending_atimers. So a Lisp program that hogs the CPU, and
> never calls any function that calls maybe_quit, will indeed block
> atimers. However, this is rare for real-life Lisp programs, because
> several core primitives call maybe_quit from time to time.
The use case here was for CPU-hogging Lisp code, though, like
`shr-insert-document'. And it doesn't seem to hit any maybe_quits in
this very synthetic test:
(with-delayed-message 0.5 "Yes"
(dotimes (i 1000000)
(with-temp-buffer
(shr-insert-document
'(html nil
(body nil
(table nil
(tr nil
(td nil "Here's a line ")
(td nil "Here's a line ")))))))))
Could `with-delayed-message' set a flag that would call maybe_quit more
often, somehow?
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Message #67 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen <larsi <at> gnus.org> writes:
> Could `with-delayed-message' set a flag that would call maybe_quit more
> often, somehow?
Or... call do_pending_atimers in our loop somewhere strategic. It's
just a check for whether the atimers variable is NULL or not, so it
should be reasonably fast. Or just test the variable directly, for that
matter.
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Message #70 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen <larsi <at> gnus.org> writes:
> Or... call do_pending_atimers in our loop somewhere strategic. It's
> just a check for whether the atimers variable is NULL or not, so it
> should be reasonably fast. Or just test the variable directly, for that
> matter.
Or... is something else going on here?
I put in an explicit `while' here, because
DEFUN ("while", Fwhile, Swhile, 1, UNEVALLED, 0,
[...]
while (!NILP (eval_sub (test)))
{
maybe_quit ();
prog_ignore (body);
}
So we're calling maybe_quit here:
(with-delayed-message 0.5 "Yes"
(dotimes (i 1000000)
(let ((j 0))
(while (< j 1000)
(setq j (1+ j))))))
Still, it's not triggered. Hm.
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Message #73 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen <larsi <at> gnus.org> writes:
> Still, it's not triggered. Hm.
Adding this to maybe_quit:
+ do_pending_atimers ();
Makes the thing work. I.e.,:
void
maybe_quit (void)
{
if (!NILP (Vquit_flag) && NILP (Vinhibit_quit))
process_quit_flag ();
else if (pending_signals)
process_pending_signals ();
do_pending_atimers ();
}
So the atimer code isn't setting pending_signals, so it's never handled
until we get a signal of a different kind. That has to be a bug, I
think?
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Message #76 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen <larsi <at> gnus.org> writes:
> So the atimer code isn't setting pending_signals, so it's never handled
> until we get a signal of a different kind. That has to be a bug, I
> think?
I misread the code -- I thought the cunningly named atimers global
variable was the ones that had fired, but it's all the atimers. So
run_timers just goes through that list and does all the callbacks.
But we wait to check that until we have a pending signal, which doesn't
make much sense, but it's probably that way because there's no other
obvious way to run it "once in a while" without running current_timespec
all the time?
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Message #79 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen <larsi <at> gnus.org> writes:
> I misread the code -- I thought the cunningly named atimers global
> variable was the ones that had fired, but it's all the atimers. So
> run_timers just goes through that list and does all the callbacks.
I lost track of this discussion, but the feature itself looks very
promising.
I didn't study what you did here, but one thing that would be really
nice is if we could update this message dynamically. Other software
show a spinning marker for example, perhaps we could do something
similar? In the simplest case, you just need to update a character
every 0.1 seconds (or something) in the sequence "|/-\".
I'm not an expert on UIX by any means, but AFAIK, users like it when
there is some visible feedback that the program didn't just go and die.
Research shows that the brain is easy to trick that way; even just a
dumb little spinning thing makes people subjectively feel that the
program is more responsive. Maybe we could use that to our advantage.
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Message #82 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen [2021-10-24 21:42:24] wrote:
> Eli Zaretskii <eliz <at> gnu.org> writes:
>> When the timer expires, it delivers a signal, but the signal handler
>> only sets a flag. The flag is checked when we call maybe_quit, which
>> calls do_pending_atimers. So a Lisp program that hogs the CPU, and
>> never calls any function that calls maybe_quit, will indeed block
>> atimers. However, this is rare for real-life Lisp programs, because
>> several core primitives call maybe_quit from time to time.
>
> The use case here was for CPU-hogging Lisp code, though, like
> `shr-insert-document'. And it doesn't seem to hit any maybe_quits in
> this very synthetic test:
Basically all loops should call `maybe_quit`, so the issue is probably
not that `maybe_quit` is not called often enough, but that for some
reason we don't set the vars that it checks or something like that.
Stefan
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Message #85 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Stefan Monnier <monnier <at> iro.umontreal.ca> writes:
> Basically all loops should call `maybe_quit`, so the issue is probably
> not that `maybe_quit` is not called often enough, but that for some
> reason we don't set the vars that it checks or something like that.
I've been trying to follow the logic in how the atimer stuff is supposed
to work. It registers a special timer fd that sets a timeout, and it's
supposed to be called back in timerfd_callback. And that happens if I'm
(for instance) idling in a `sleep-for'.
When Emacs is busy looping, we never get a callback -- presumably
because we're not reading any file descriptors in that case? But...
was the idea that this would work in a busy Emacs? I mean, events from
the keyboard/mouse are able to poke Emacs in a way that it realises that
it has a pending event to handle, but not the timerfd?
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Message #88 received at 19776 <at> debbugs.gnu.org (full text, mbox):
[[[ To any NSA and FBI agents reading my email: please consider ]]]
[[[ whether defending the US Constitution against all enemies, ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]
> IOW, I ask if what you ask for is a little bit "too nice", and if we
> shouldn't just fix the problematic ELisp code itself to use a progress
> reporter or something to that effect.
How much slower would it get if it counts the number of lines to be
indented, first thing, and decides based on that whether to give
progress messages?
--
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Founder, Free Software Foundation (https://fsf.org)
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Message #91 received at 19776 <at> debbugs.gnu.org (full text, mbox):
On Okt 25 2021, Lars Ingebrigtsen wrote:
> When Emacs is busy looping, we never get a callback -- presumably
> because we're not reading any file descriptors in that case? But...
> was the idea that this would work in a busy Emacs? I mean, events from
> the keyboard/mouse are able to poke Emacs in a way that it realises that
> it has a pending event to handle, but not the timerfd?
maybe_quit does call process_pending_signals, so this should work the
same way as quit.
Andreas.
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Message #94 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Stefan Kangas <stefan <at> marxist.se> writes:
> I didn't study what you did here, but one thing that would be really
> nice is if we could update this message dynamically. Other software
> show a spinning marker for example, perhaps we could do something
> similar? In the simplest case, you just need to update a character
> every 0.1 seconds (or something) in the sequence "|/-\".
>
> I'm not an expert on UIX by any means, but AFAIK, users like it when
> there is some visible feedback that the program didn't just go and die.
> Research shows that the brain is easy to trick that way; even just a
> dumb little spinning thing makes people subjectively feel that the
> program is more responsive. Maybe we could use that to our advantage.
These days, you usually get a spinning thing from the OS when the
application is unresponsive in this way, I guess?
But, yes, this mechanism could easily be extended to display a spinner.
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Message #97 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Richard Stallman <rms <at> gnu.org> writes:
> How much slower would it get if it counts the number of lines to be
> indented, first thing, and decides based on that whether to give
> progress messages?
The issue isn't the number of lines, and it has nothing to do with
indentation -- it's about the complexity of the layout and how easy it
is to make it fit into the buffer. So making a guess at whether a given
HTML document will take a long or short time to render isn't trivial.
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Message #100 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Andreas Schwab <schwab <at> linux-m68k.org> writes:
>> When Emacs is busy looping, we never get a callback -- presumably
>> because we're not reading any file descriptors in that case? But...
>> was the idea that this would work in a busy Emacs? I mean, events from
>> the keyboard/mouse are able to poke Emacs in a way that it realises that
>> it has a pending event to handle, but not the timerfd?
>
> maybe_quit does call process_pending_signals, so this should work the
> same way as quit.
But how do we make Emacs respond to timerfd events the same as quit?
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Message #103 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Cc: Eli Zaretskii <eliz <at> gnu.org>, 19776 <at> debbugs.gnu.org, rms <at> gnu.org,
> monnier <at> iro.umontreal.ca
> Date: Mon, 25 Oct 2021 15:08:48 +0200
>
> Stefan Kangas <stefan <at> marxist.se> writes:
>
> > I didn't study what you did here, but one thing that would be really
> > nice is if we could update this message dynamically. Other software
> > show a spinning marker for example, perhaps we could do something
> > similar? In the simplest case, you just need to update a character
> > every 0.1 seconds (or something) in the sequence "|/-\".
> >
> > I'm not an expert on UIX by any means, but AFAIK, users like it when
> > there is some visible feedback that the program didn't just go and die.
> > Research shows that the brain is easy to trick that way; even just a
> > dumb little spinning thing makes people subjectively feel that the
> > program is more responsive. Maybe we could use that to our advantage.
>
> These days, you usually get a spinning thing from the OS when the
> application is unresponsive in this way, I guess?
>
> But, yes, this mechanism could easily be extended to display a spinner.
??? We already have it: see hourglass pointer. And it does use
atimers.
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Message #106 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen [2021-10-25 15:11:03] wrote:
> Andreas Schwab <schwab <at> linux-m68k.org> writes:
>>> When Emacs is busy looping, we never get a callback -- presumably
>>> because we're not reading any file descriptors in that case? But...
>>> was the idea that this would work in a busy Emacs? I mean, events from
>>> the keyboard/mouse are able to poke Emacs in a way that it realises that
>>> it has a pending event to handle, but not the timerfd?
>>
>> maybe_quit does call process_pending_signals, so this should work the
>> same way as quit.
>
> But how do we make Emacs respond to timerfd events the same as quit?
Can't it give a SIGIO?
Stefan
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Message #109 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Eli Zaretskii <eliz <at> gnu.org> writes:
> ??? We already have it: see hourglass pointer. And it does use
> atimers.
Oh, the spinner thing that's displayed when Emacs is busy is a thing we
do ourselves? I was so used to none of the things Emacs does with the
mouse pointer not working under Gnome (like setting the colours) that I
assumed that it was a thing the window manager (or Gnome did).
So we don't need to extend this to make a spinner on graphical systems,
at least.
And the hourglass spinner has the same issue I've been dealing with
here: It's not triggered until you give Emacs an input even (either from
the mouse of the keyboard).
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Message #112 received at 19776 <at> debbugs.gnu.org (full text, mbox):
On Okt 25 2021, Stefan Monnier wrote:
> Lars Ingebrigtsen [2021-10-25 15:11:03] wrote:
>> Andreas Schwab <schwab <at> linux-m68k.org> writes:
>>>> When Emacs is busy looping, we never get a callback -- presumably
>>>> because we're not reading any file descriptors in that case? But...
>>>> was the idea that this would work in a busy Emacs? I mean, events from
>>>> the keyboard/mouse are able to poke Emacs in a way that it realises that
>>>> it has a pending event to handle, but not the timerfd?
>>>
>>> maybe_quit does call process_pending_signals, so this should work the
>>> same way as quit.
>>
>> But how do we make Emacs respond to timerfd events the same as quit?
>
> Can't it give a SIGIO?
atimer already knows to handle SIGALRM for this.
Andreas.
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Message #115 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Andreas Schwab <schwab <at> linux-m68k.org> writes:
>> Can't it give a SIGIO?
>
> atimer already knows to handle SIGALRM for this.
In my testing, handle_alarm_signal (which should set pending_signals) is
never called.
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Message #118 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Cc: Eli Zaretskii <eliz <at> gnu.org>, stefan <at> marxist.se, rms <at> gnu.org,
> 19776 <at> debbugs.gnu.org
> Date: Mon, 25 Oct 2021 00:28:12 +0200
>
> I've been trying to follow the logic in how the atimer stuff is supposed
> to work. It registers a special timer fd that sets a timeout, and it's
> supposed to be called back in timerfd_callback. And that happens if I'm
> (for instance) idling in a `sleep-for'.
>
> When Emacs is busy looping, we never get a callback -- presumably
> because we're not reading any file descriptors in that case? But...
> was the idea that this would work in a busy Emacs? I mean, events from
> the keyboard/mouse are able to poke Emacs in a way that it realises that
> it has a pending event to handle, but not the timerfd?
I didn't yet take a good look at the code, so I may not make sense,
but: if the problem with getting Emacs to check atimers is that it
needs an input event, then does it help to define a one-time timer
in addition to arranging the atimer? When we have an active timer, we
artificially reduce the timeout for pselect so that it expires before
the expected timer -- maybe that is all that's needed, to cause the
input loop crank one more revolution?
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Message #121 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen <larsi <at> gnus.org> writes:
> In my testing, handle_alarm_signal (which should set pending_signals) is
> never called.
I should have read the code more closely:
void
init_atimer (void)
{
#ifdef HAVE_ITIMERSPEC
# ifdef HAVE_TIMERFD
/* Until this feature is considered stable, you can ask to not use it. */
timerfd = (egetenv ("EMACS_IGNORE_TIMERFD") || have_buggy_timerfd () ? -1 :
timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC));
# endif
if (timerfd < 0)
{
struct sigevent sigev;
sigev.sigev_notify = SIGEV_SIGNAL;
So if we have timerfd, the alarm stuff is not set up.
And... uhm...
EMACS_IGNORE_TIMERFD=t ./src/emacs
doesn't disable it, either? That egetenv call returns NULL even if I
start Emacs like that? Odd. Anyway, if I forcibly disable timerfd,
then the atimers work like they're supposed to, and the correct code
paths are triggered at the time they're supposed to.
So the timerfd stuff doesn't actually work.
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Message #124 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Date: Mon, 25 Oct 2021 16:05:01 +0200
> Cc: stefan <at> marxist.se, 19776 <at> debbugs.gnu.org, rms <at> gnu.org,
> Stefan Monnier <monnier <at> iro.umontreal.ca>
>
> So the timerfd stuff doesn't actually work.
Do you see timerfd in the set of descriptors passed to thread_select?
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Message #127 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Eli Zaretskii <eliz <at> gnu.org> writes:
> Do you see timerfd in the set of descriptors passed to thread_select?
I do see events from timerfd, so it's not completely non-working. It's
just that when nothing is calling `accept-process-output' one way or
another, Emacs doesn't get any events from it. If we do call
`accept-process-output', timerfd_callback is called.
The reason that the atimers are processed when Emacs gets keyboard input
is that that makes pending_signals set, and that in turn makes
maybe_quit check all the atimers to see if any of them have expired.
But we would have an identical outcome if we had just not set up timerfd
at all in these cases.
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Message #130 received at 19776 <at> debbugs.gnu.org (full text, mbox):
On Okt 25 2021, Lars Ingebrigtsen wrote:
> doesn't disable it, either? That egetenv call returns NULL even if I
> start Emacs like that?
Because process-environment hasn't been set up yet.
Andreas.
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Message #133 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen <larsi <at> gnus.org> writes:
> EMACS_IGNORE_TIMERFD=t ./src/emacs
>
> doesn't disable it, either? That egetenv call returns NULL even if I
> start Emacs like that? Odd.
So this is a tangent, but this is a repeatable bug. If I call
printf ("fd: %s\n", egetenv ("FOO"));
from init_atimer, it always says (null). (And "FOO" is defined.)
However, if I call egetenv later, I do get the correct value.
So is there something about (e)getenv that makes it not work during the
(early) startup of Emacs?
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Message #136 received at 19776 <at> debbugs.gnu.org (full text, mbox):
On Okt 25 2021, Eli Zaretskii wrote:
> I didn't yet take a good look at the code, so I may not make sense,
> but: if the problem with getting Emacs to check atimers is that it
> needs an input event, then does it help to define a one-time timer
> in addition to arranging the atimer? When we have an active timer, we
> artificially reduce the timeout for pselect so that it expires before
> the expected timer -- maybe that is all that's needed, to cause the
> input loop crank one more revolution?
Since timerfd is one of the descriptors to wait for, it already causes
pselect to return in due time. But it won't help if pselect is not
called in the first place.
Andreas.
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Message #139 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Andreas Schwab <schwab <at> linux-m68k.org> writes:
>> doesn't disable it, either? That egetenv call returns NULL even if I
>> start Emacs like that?
>
> Because process-environment hasn't been set up yet.
Right. During Emacs startup, it asks for these four variables before
process-environment has been set up:
No EMACS_IGNORE_TIMERFD
No EMACSDATA
No EMACS_FONT_LOG
No HANGUL_KEYBOARD_TYPE
So that's four more bugs, I guess.
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Message #142 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen <larsi <at> gnus.org> writes:
> No EMACS_IGNORE_TIMERFD
> No EMACSDATA
> No EMACS_FONT_LOG
> No HANGUL_KEYBOARD_TYPE
>
> So that's four more bugs, I guess.
No, just one. I interpreted the output wrong -- the only thing that's
getenv'd before the environment is EMACS_IGNORE_TIMERFD.
So this patch will fix that:
diff --git a/src/emacs.c b/src/emacs.c
index a24543a586..032b27fcf3 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -1872,7 +1872,6 @@ main (int argc, char **argv)
init_bignum ();
init_threads ();
init_eval ();
- init_atimer ();
running_asynch_code = 0;
init_random ();
@@ -2034,6 +2033,9 @@ main (int argc, char **argv)
if (!will_dump_p ())
set_initial_environment ();
+ /* Has to run after the environment is set up. */
+ init_atimer ();
+
#ifdef WINDOWSNT
globals_of_w32 ();
#ifdef HAVE_W32NOTIFY
I think it's probably safe to push to Emacs 28, but since nobody has
complained about it since 2014 (when this was introduced), I'm pushing
it to master instead.
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Message #145 received at 19776 <at> debbugs.gnu.org (full text, mbox):
The timerfd stuff was added in
commit 768b24eb0e880c0b39e36fd089905cdca572a758
Author: Dmitry Antipov <dmantipov <at> yandex.ru>
AuthorDate: Mon Jul 28 10:28:15 2014 +0400
On GNU/Linux, use timerfd for asynchronous timers.
so I've added Dmitry to the CCs to get some input.
Dmitry, the issue is that with timerfd, no atimers are delivered when
Emacs is busy-looping, like:
(with-delayed-message 2 "Yes"
(while t))
If we disable the timerfd stuff, then the timer will fire after two
seconds. So I'm wondering whether this used to work when timerfd was
introduced (and this has regressed over the years), or whether it's
always been a design constraint that timerfd events would never be
delivered when Emacs ways busy-looping?
When Emacs is idling (and polling the fds), then the timerfd approach
works well, for instance with:
(with-delayed-message 2 "Yes"
(sleep-for 10))
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Message #148 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Cc: Eli Zaretskii <eliz <at> gnu.org>, stefan <at> marxist.se,
> 19776 <at> debbugs.gnu.org, rms <at> gnu.org, monnier <at> iro.umontreal.ca, Andreas
> Schwab <schwab <at> linux-m68k.org>
> Date: Mon, 25 Oct 2021 17:05:10 +0200
>
> Dmitry, the issue is that with timerfd, no atimers are delivered when
> Emacs is busy-looping, like:
>
> (with-delayed-message 2 "Yes"
> (while t))
Btw, the above signals an error; I need to use
(with-delayed-message (2 "Yes")
(while t))
instead, to make it work.
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Message #151 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Cc: Eli Zaretskii <eliz <at> gnu.org>, stefan <at> marxist.se, rms <at> gnu.org,
> 19776 <at> debbugs.gnu.org
> Date: Mon, 25 Oct 2021 00:28:12 +0200
>
> Stefan Monnier <monnier <at> iro.umontreal.ca> writes:
>
> > Basically all loops should call `maybe_quit`, so the issue is probably
> > not that `maybe_quit` is not called often enough, but that for some
> > reason we don't set the vars that it checks or something like that.
>
> I've been trying to follow the logic in how the atimer stuff is supposed
> to work. It registers a special timer fd that sets a timeout, and it's
> supposed to be called back in timerfd_callback. And that happens if I'm
> (for instance) idling in a `sleep-for'.
>
> When Emacs is busy looping, we never get a callback -- presumably
> because we're not reading any file descriptors in that case? But...
> was the idea that this would work in a busy Emacs? I mean, events from
> the keyboard/mouse are able to poke Emacs in a way that it realises that
> it has a pending event to handle, but not the timerfd?
Input events work via SIGIO on X, and SIGIO sets pending_signals, and
then we check the atimers.
I guess this means timerfd is only good for when Emacs is calling
thread_select, i.e. either it's idling or waiting for process output.
So timerfd, if available, should be used together with interval
timers, so that we get SIGALRM when we aren't idle, I guess. Not
either timerfd or interval timers, but both.
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Message #154 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Eli Zaretskii <eliz <at> gnu.org> writes:
>> (with-delayed-message 2 "Yes"
>> (while t))
>
> Btw, the above signals an error; I need to use
>
> (with-delayed-message (2 "Yes")
> (while t))
>
> instead, to make it work.
Yes, I changed the syntax half an hour ago. >"?
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Message #157 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Eli Zaretskii <eliz <at> gnu.org> writes:
> I guess this means timerfd is only good for when Emacs is calling
> thread_select, i.e. either it's idling or waiting for process output.
> So timerfd, if available, should be used together with interval
> timers, so that we get SIGALRM when we aren't idle, I guess. Not
> either timerfd or interval timers, but both.
But does timerfd give us anything extra, then? If we only use interval
timers, things seems to work fine. So I wonder what the purpose of
introducing the timerfd stuff was. Greater efficiency?
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Message #160 received at 19776 <at> debbugs.gnu.org (full text, mbox):
When not using the timerfd stuff, the hourglass timer is triggered
correctly even when busy-looping like this:
(while t)
But it's not actually displayed until there's a keyboard/mouse event, or
redisplay is triggered otherwise. So it's this code:
static void
x_show_hourglass (struct frame *f)
{
[...]
x->hourglass_window = XCreateWindow
(dpy, parent, 0, 0, 32000, 32000, 0, 0,
InputOnly, CopyFromParent, mask, &attrs);
}
XMapRaised (dpy, x->hourglass_window);
XFlush (dpy);
}
}
}
If I stick a call to Fredisplay in there, then it'll actually display
the hourglass, but that seems rather heavy-handed. What's the proper
way to trigger the redisplay here?
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Message #163 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Cc: 19776 <at> debbugs.gnu.org, dmantipov <at> yandex.ru, stefan <at> marxist.se,
> schwab <at> linux-m68k.org, monnier <at> iro.umontreal.ca, rms <at> gnu.org
> Date: Mon, 25 Oct 2021 18:41:10 +0200
>
> static void
> x_show_hourglass (struct frame *f)
> {
> [...]
> x->hourglass_window = XCreateWindow
> (dpy, parent, 0, 0, 32000, 32000, 0, 0,
> InputOnly, CopyFromParent, mask, &attrs);
> }
>
> XMapRaised (dpy, x->hourglass_window);
> XFlush (dpy);
> }
> }
> }
>
> If I stick a call to Fredisplay in there, then it'll actually display
> the hourglass, but that seems rather heavy-handed. What's the proper
> way to trigger the redisplay here?
Try calling FRAME_MOUSE_UPDATE.
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Message #166 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Cc: monnier <at> iro.umontreal.ca, stefan <at> marxist.se, rms <at> gnu.org,
> 19776 <at> debbugs.gnu.org
> Date: Mon, 25 Oct 2021 18:19:01 +0200
>
> Eli Zaretskii <eliz <at> gnu.org> writes:
>
> > I guess this means timerfd is only good for when Emacs is calling
> > thread_select, i.e. either it's idling or waiting for process output.
> > So timerfd, if available, should be used together with interval
> > timers, so that we get SIGALRM when we aren't idle, I guess. Not
> > either timerfd or interval timers, but both.
>
> But does timerfd give us anything extra, then? If we only use interval
> timers, things seems to work fine. So I wonder what the purpose of
> introducing the timerfd stuff was. Greater efficiency?
Not sure. Maybe more reliability? Signals can be lost or blocked. I
hope Dmitry will be able to answer that.
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Message #169 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Eli Zaretskii <eliz <at> gnu.org> writes:
>> If I stick a call to Fredisplay in there, then it'll actually display
>> the hourglass, but that seems rather heavy-handed. What's the proper
>> way to trigger the redisplay here?
>
> Try calling FRAME_MOUSE_UPDATE.
Didn't make a difference, unfortunately.
redisplay_preserve_echo_area (2);
does the trick... That function seems to be called from everywhere --
perhaps that's the one to use:
This is useful in situations where you need to redisplay but no
user action has occurred, making it inappropriate for the message
area to be cleared.
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Message #172 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Eli Zaretskii <eliz <at> gnu.org> writes:
> Not sure. Maybe more reliability? Signals can be lost or blocked. I
> hope Dmitry will be able to answer that.
Yup.
As a simple test, I tried enabling both timerfd and alarms at the same
time, and I don't see anything breaking. Which isn't surprising, since
all the alarm handler does is set pending_signals, but it's nice to have
it confirmed. :-)
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Message #175 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Cc: Dmitry Antipov <dmantipov <at> yandex.ru>, monnier <at> iro.umontreal.ca,
> stefan <at> marxist.se, rms <at> gnu.org, 19776 <at> debbugs.gnu.org
> Date: Mon, 25 Oct 2021 19:01:28 +0200
>
> Eli Zaretskii <eliz <at> gnu.org> writes:
>
> > Not sure. Maybe more reliability? Signals can be lost or blocked. I
> > hope Dmitry will be able to answer that.
>
> Yup.
Also, if we are stuck in pselect call with a long timeout, we won't
get around to calling maybe_quit or process_pending_signals, right?
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Message #178 received at 19776 <at> debbugs.gnu.org (full text, mbox):
On Okt 25 2021, Eli Zaretskii wrote:
> Also, if we are stuck in pselect call with a long timeout, we won't
> get around to calling maybe_quit or process_pending_signals, right?
pselect will return as soon as input is available.
Andreas.
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Message #181 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> From: Andreas Schwab <schwab <at> linux-m68k.org>
> Cc: Lars Ingebrigtsen <larsi <at> gnus.org>, dmantipov <at> yandex.ru,
> stefan <at> marxist.se, 19776 <at> debbugs.gnu.org, rms <at> gnu.org,
> monnier <at> iro.umontreal.ca
> Date: Mon, 25 Oct 2021 19:11:03 +0200
>
> On Okt 25 2021, Eli Zaretskii wrote:
>
> > Also, if we are stuck in pselect call with a long timeout, we won't
> > get around to calling maybe_quit or process_pending_signals, right?
>
> pselect will return as soon as input is available.
I mean without timerfd, and if there's no input.
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Message #184 received at 19776 <at> debbugs.gnu.org (full text, mbox):
On Okt 25 2021, Eli Zaretskii wrote:
>> From: Andreas Schwab <schwab <at> linux-m68k.org>
>> Cc: Lars Ingebrigtsen <larsi <at> gnus.org>, dmantipov <at> yandex.ru,
>> stefan <at> marxist.se, 19776 <at> debbugs.gnu.org, rms <at> gnu.org,
>> monnier <at> iro.umontreal.ca
>> Date: Mon, 25 Oct 2021 19:11:03 +0200
>>
>> On Okt 25 2021, Eli Zaretskii wrote:
>>
>> > Also, if we are stuck in pselect call with a long timeout, we won't
>> > get around to calling maybe_quit or process_pending_signals, right?
>>
>> pselect will return as soon as input is available.
>
> I mean without timerfd, and if there's no input.
A signal also interrupts pselect.
Andreas.
--
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
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Message #187 received at 19776 <at> debbugs.gnu.org (full text, mbox):
> From: Andreas Schwab <schwab <at> linux-m68k.org>
> Cc: larsi <at> gnus.org, dmantipov <at> yandex.ru, stefan <at> marxist.se,
> 19776 <at> debbugs.gnu.org, rms <at> gnu.org, monnier <at> iro.umontreal.ca
> Date: Mon, 25 Oct 2021 19:52:33 +0200
>
> >> > Also, if we are stuck in pselect call with a long timeout, we won't
> >> > get around to calling maybe_quit or process_pending_signals, right?
> >>
> >> pselect will return as soon as input is available.
> >
> > I mean without timerfd, and if there's no input.
>
> A signal also interrupts pselect.
Yes, but my reading of wait_reading_process_output is that in that
case we loop right back and re-enter pselect.
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Message #190 received at 19776 <at> debbugs.gnu.org (full text, mbox):
eww now gives a message about it working when it's rendering the HTML
(and it takes a long time), so I don't think there's more to be done
here, and I'm closing this bug report finally.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
bug marked as fixed in version 29.1, send any further explanations to
19776 <at> debbugs.gnu.org and rms <at> gnu.org
Request was from
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Message #195 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Lars Ingebrigtsen <larsi <at> gnus.org> writes:
> Eli Zaretskii <eliz <at> gnu.org> writes:
>
>> ??? We already have it: see hourglass pointer. And it does use
>> atimers.
[...]
> So we don't need to extend this to make a spinner on graphical systems,
> at least.
I was talking about showing something in the actual Emacs window, not
just changing the mouse pointer. The mouse pointer can change also when
some program has just crashed, so users won't necessarily take this as a
sign that "everything is okay, just give us a minute and we'll be back".
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Message #198 received at 19776 <at> debbugs.gnu.org (full text, mbox):
Stefan Kangas <stefan <at> marxist.se> writes:
> I was talking about showing something in the actual Emacs window, not
> just changing the mouse pointer. The mouse pointer can change also when
> some program has just crashed, so users won't necessarily take this as a
> sign that "everything is okay, just give us a minute and we'll be back".
And there's no hourglass pointer in terminal Emacs (which apparently is
almost as popular as GUI Emacs for some reason), so perhaps it's worth
having a spinning thing somewhere. In the mode line, for instance.
However, if we want that, perhaps it shouldn't be tied to
with-delayed-message, but work exactly like the hourglass -- i.e., start
spinning whenever Emacs is busy for a while.
I'm not at all sure whether there'd be any negative repercussions to
spinning a glyph in the mode line area (for instance -- what about if
you're running over a slow ssh connection?), but perhaps it's worth
exploring and see how goes?
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
bug archived.
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This bug report was last modified 3 years and 206 days ago.
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