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bug#18151: 24.3.92; term: slow ansi colors rendering

From: carlosjosepita
Subject: bug#18151: 24.3.92; term: slow ansi colors rendering
Date: Wed, 30 Jul 2014 12:39:36 -0300

Some applications render quite slowly in emacs terminal emulator. One
example is alsamixer, which has a very simple ui. Another example is
mc. The editor of the beast, instead, works like a charm, at least in
its legacy incarnation. I think the issue is with the heavy use of ansi
colors by some applications.

I've read other similar bug reports saying that a number of errors
appear in the *Messages* buffer regarding missing colors or something
like that. Well, this is not the problem anymore. Everything works fine,
no errors are shown, it's just that the rendering is slow.


In GNU Emacs (i686-pc-linux-gnu, GTK+ Version 3.12.2) of
 2014-07-25 on localhost Windowing system distributor `The X.Org
 Foundation', version 11.0.11501000 Configured using: `configure
 --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
 --localstatedir=/var --with-x-toolkit=gtk3 --with-xft
 'CFLAGS=-march=i686 -mtune=generic -O2 -pipe -fstack-protector-strong
 --param=ssp-buffer-size=4' CPPFLAGS=-D_FORTIFY_SOURCE=2

Important settings:
  value of $LC_COLLATE: en_US.UTF-8
  value of $LC_CTYPE: en_US.UTF-8
  value of $LC_MESSAGES: en_US.UTF-8
  value of $LC_MONETARY: en_US.UTF-8
  value of $LC_NUMERIC: en_US.UTF-8
  value of $LC_TIME: en_US.UTF-8
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Emacs-Lisp

Minor modes in effect:
  winner-mode: t
  shell-dirtrack-mode: t
  ido-everywhere: t
  global-auto-complete-mode: t
  auto-complete-mode: t
  tooltip-mode: t
  electric-indent-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
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<return> N n L <down> <up> u <down> <up> u <down> <down> 
<down> <down> <down> <down> <down> <down> u u <menu-bar> 
<Groups> <Sort> <Default sort> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <return> C-x b <right> <return> <up> 
<up> <up> <up> <up> M-x r e p o r t - e <tab> <ret

Recent messages:
nnimap read 1485k from imap.gmail.com (initial sync of 16 groups; please wait)
nnimap read 1852k from imap.gmail.com (initial sync of 16 groups; please wait)
nnimap read 2240k from imap.gmail.com (initial sync of 16 groups; please wait)
Checking new news...done
You can run the command `gnus' with <f5>
Checking new news...done
line-move-visual: Beginning of buffer [8 times]
nnimap read 0k from imap.gmail.com
No more unseen articles
No more unread articles

Load-path shadows:
/home/loscar/.emacs.d/elpa/popup-20140207.1702/popup hides 
/home/loscar/.emacs.d/elpa/auto-complete-20140726.303/auto-complete hides 
hides /usr/share/emacs/site-lisp/auto-complete/auto-complete-config
~/.emacs.d/lisp/python hides /usr/share/emacs/24.3.92/lisp/progmodes/python

(shadow sort mail-extr emacsbug sendmail qp gnus-ml nndraft nnmh
nnfolder utf-7 pp rfc2104 gnutls nnimap utf7 netrc gnus-agent gnus-srvr
gnus-score score-mode nnvirtual gnus-msg gnus-art mm-uu mml2015
epg-config mm-view mml-smime smime dig nntp gnus-cache gnus-sum nnoo
gnus-group gnus-undo nnmail mail-source gnus-start gnus-spec gnus-int
gnus-range message idna rfc822 mml mml-sec mm-decode mm-bodies mm-encode
mailabbrev gmm-utils mailheader gnus-win cus-edit cus-start cus-load
misearch multi-isearch mule-util url-queue timezone parse-time shr-color
color network-stream starttls url-http tls mail-parse rfc2231 rfc2047
rfc2045 ietf-drums url-gw url-cache url-auth eww mm-url gnus gnus-ems
nnheader mail-utils wid-edit url url-proxy url-privacy url-expand
url-methods url-history url-cookie url-domsuf url-util url-parse
url-vars mailcap shr jka-compr two-column term disp-table ehelp vc-git
help-mode flymake wombat-theme winner windmove ac-nrepl
cider-interaction apropos arc-mode archive-mode cider-doc org-table org
org-macro org-footnote org-pcomplete org-list org-faces org-entities
noutline outline easy-mmode org-version ob-emacs-lisp ob ob-tangle
org-src ob-ref ob-lob ob-table ob-keys ob-exp ob-comint ob-core ob-eval
org-compat org-macs org-loaddefs find-func cal-menu calendar
cal-loaddefs cider-test cider-stacktrace cider-client nrepl-client
cider-util ewoc etags dash clojure-mode imenu inf-lisp tramp
tramp-compat auth-source eieio byte-opt bytecomp byte-compile cconv
eieio-core gnus-util mm-util mail-prsvr password-cache tramp-loaddefs
cl-macs trampver cl gv ess-toolbar ess-mouse mouseme thingatpt
browse-url ess-menu ess-swv ess-noweb ess-noweb-font-lock-mode
ess-bugs-l essd-els ess-sas-d ess-sas-l ess-sas-a shell pcomplete
ess-sta-d ess-sta-l cc-vars cc-defs make-regexp ess-sp6-d ess-sp3-d
ess-julia ess-r-d compile ess-tracebug format-spec ess-roxy advice
hideshow ess-help ess-developer ess-r-args eldoc help-fns ess-s-l ess
ess-inf comint ansi-color ring ess-mode ess-noweb-mode ess-utils
ess-custom executable ess-compat ess-site ido auto-complete-config
auto-complete edmacro kmacro popup cl-loaddefs cl-lib info easymenu
package time-date tooltip 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 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 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 430225 112766)
 (symbols 24 45666 8)
 (miscs 20 499 794)
 (strings 16 108809 15742)
 (string-bytes 1 3255353)
 (vectors 8 45254)
 (vector-slots 4 1504548 15070)
 (floats 8 540 602)
 (intervals 28 4870 1335)
 (buffers 512 32)
 (heap 1024 48863 2126))

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