bug#13677: 24.2.50; workng on remote hosts with eshell is not very enjoyable

[Andreas Politz]

emacs -Q
M-x eshell
cd /ssh:somehost.com:
stat .
stat .
...

Every stat command starts a new tramp process, which, in my case, takes
about 3-4 seconds to get going and renders eshell fairly useless for
this kind of work. 

Can this be changed such that eshell uses start-file-process only if the
command results in a background process and use process-file otherwise ?

This seems to be a follow up to bug #3957.

Andreas




In GNU Emacs 24.2.50.1 (x86_64-pc-linux-gnu, GTK+ Version 2.20.1)
 of 2012-10-13 on cw-bkp0, modified by Debian
 (emacs-snapshot package, version 2:20121009-1+squeeze)
Windowing system distributor `The X.Org Foundation', version 11.0.10707000
System Description:     Debian GNU/Linux 6.0.6 (squeeze)

Configured using:
 `configure '--build' 'x86_64-linux-gnu' '--host' 'x86_64-linux-gnu'
 '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib'
 '--localstatedir=/var' '--infodir=/usr/share/info'
 '--mandir=/usr/share/man' '--with-pop=yes'
 
'--enable-locallisppath=/etc/emacs-snapshot:/etc/emacs:/usr/local/share/emacs/24.2.50/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.2.50/site-lisp:/usr/share/emacs/site-lisp'
 '--without-compress-info' '--with-crt-dir=/usr/lib//' '--with-x=yes'
 '--with-x-toolkit=gtk' '--with-imagemagick=yes'
 'build_alias=x86_64-linux-gnu' 'host_alias=x86_64-linux-gnu'
 'CFLAGS=-DDEBIAN -DSITELOAD_PURESIZE_EXTRA=5000 -g -O2' 'LDFLAGS=-g
 -Wl,--as-needed -znocombreloc' 'CPPFLAGS=''

Important settings:
  value of $LC_COLLATE: C
  value of $LC_MESSAGES: C
  value of $LANG: de_DE.UTF-8
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: EShell

Minor modes in effect:
  ispell-track-input-method: t
  idle-help-selwin-mode: t
  idle-help-mode: t
  tblc-mode: t
  emacs-interactive-mode: t
  show-paren-mode: t
  recentf-mode: t
  yas/global-mode: t
  window-numbering-mode: t
  shell-dirtrack-mode: t
  scroll-other-window-mode: t
  savehist-mode: t
  iswitchb-mode: t
  TeX-PDF-mode: t
  ekey-mode: t
  tooltip-mode: t
  mouse-wheel-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
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ 
C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ 
C-/ C-/ C-M-x C-x o M-p <return> C-M-x g g <return> 
M-p <return> <return> M-p DEL <return> M-p <return> 
M-p M-h s l e e p SPC 1 m & <return> C-x m C-y C-/ 
C-n C-e C-y C-p C-y M-b M-b M-b DEL DEL DEL DEL @ C-e 
C-n C-n C-n C-n C-n <return> T h i s SPC s e e m s 
SPC t o SPC b e SPC M-! b z M-p <return> C-x o M-! 
M-p <return> C-x o M-h h a v e SPC b e e n SPC a d 
d r e s s e d SPC i n SPC M-b C-k f o r SPC s o m e 
M-b M-b M-b C-e SPC t i m e SPC n o w . M-q C-p C-p 
C-p C-p C-p C-p C-M-b C-M-b C-M-b C-M-b C-k C-n C-n 
C-n C-n C-n C-n C-a C-k C-x k <return> y M-x r e p 
o r t <return> b u g <return> e s h e l l SPC o <backspace> 
c o m m a n d s SPC o n SPC r e m o t e SPC h o s t 
s C-M-b C-M-b C-M-b C-M-b C-e SPC M-b M-b M-b M-b M-d 
M-b M-d w o r k n g M-SPC C-e w i t h SPC e s h e l 
l SPC i s SPC n o t SPC v e r y SPC e n j o y a b l 
e <return> C-x k <return> y M-x c d <return> C-g c 
d SPC / <return> M-x M-x M-x <return>

Recent messages:
Tramp: Opening connection for ssh.fh-trier.de using ssh...
Tramp: Sending command `exec ssh   -e none ssh.fh-trier.de'

Tramp: Waiting for prompts from remote shell
Tramp: Sending command `exec ssh   -e none ssh.fh-trier.de'
Tramp: Found remote shell prompt on `ssh.fh-trier.de'
Tramp: Opening connection for ssh.fh-trier.de using ssh...done
Quit
Buffer *unsent mail to bug-gnu-emacs@gnu.org* modified; kill anyway? (y or n)  y
Quit

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Features:
(shadow emacsbug vc-bzr cc-langs cc-mode cc-fonts cc-guess cc-menus
cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs mule-util
reposition tramp-cmds tramp-cache tramp-sh misearch multi-isearch
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ehelp electric ange-ftp em-script em-prompt em-ls em-hist em-pred
em-glob em-dirs em-cmpl em-basic em-banner em-alias esh-var esh-io
esh-cmd esh-opt esh-ext esh-proc esh-arg esh-groups eshell esh-module
esh-mode esh-util mailalias smtpmail sendmail qp ispell quail sort
smiley gnus-cite mail-extr gnus-async gnus-bcklg gnus-ml vc-dispatcher
vc-svn disp-table two-column iso-transl nndraft nnmh utf-7 gnutls
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gnus-agent gnus-srvr gnus-score score-mode nnvirtual gnus-msg gnus-art
mm-uu mml2015 epg-config mm-view mml-smime smime dig mailcap nntp
gnus-cache gnus-sum nnoo gnus-group gnus-undo nnmail mail-source
gnus-start gnus-spec gnus-int gnus-range message rfc822 mml mml-sec
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nnheader mail-utils imenu plugin-autoloads emacs-customizations
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preview-customizations preview-latex-customizations
preview-appearance-customizations TeX-parse-customizations
TeX-file-customizations TeX-command-customizations
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files-customizations uniquify-customizations uniquify
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