Simple Emacs for rescue or quick edits?

Simple Emacs for rescue or quick edits?

[Oleksandr Gavenko]

Sometime I need quick small editor. I maintain (in ~/.bashrc):

  alias e=emacsclient -a emacs -n

for most cases it's enough.

But in case of rescue and EDITOR env var running Emacs is not convenient.

I look to jove and zile:

  http://www.emacswiki.org/emacs/ErsatzEmacs

but both have no colours support...

I become think that EDITOR=vim is best option...

joe also have syntax highlighting but I prefer to remember vim commands then
joe own...

Any suggestions?

-- 
Best regards!

Re: Simple Emacs for rescue or quick edits?

[Emanuel Berg]

Oleksandr Gavenko <gavenkoa@gmail.com> writes:

> But in case of rescue and EDITOR env var running Emacs is not
> convenient.

Can't you have Emacs running all the time?

-- 
Emanuel Berg - programmer (hire me! CV below)
computer projects: http://user.it.uu.se/~embe8573
internet activity: http://home.student.uu.se/embe8573

Re: Simple Emacs for rescue or quick edits?

[Pascal J. Bourguignon]

Oleksandr Gavenko <gavenkoa@gmail.com> writes:

> Sometime I need quick small editor. I maintain (in ~/.bashrc):
>
>   alias e=emacsclient -a emacs -n
>
> for most cases it's enough.
>
> But in case of rescue and EDITOR env var running Emacs is not convenient.

Why wouldn't it?  I use enw:

$ cat > ~/bin/enw <<EOF
#!/bin/bash
exec emacs -q -nw "$@"
EOF
$ chmod 755 ~/bin/enw
$ export EDITOR=enw
$ export VISUAL=enw


alias e='emacs -q -nw' # works too.

for quick edits.   And when I say quick, I mean quick: almost 1/4 the
boot time of vim:

[pjb@kuiper :0.0 ~]$ time echo :q |vim
real    0m2.027s
user    0m0.016s
sys     0m0.008s

[pjb@kuiper :0.0 ~]$ time emacs -q -nw -e 'kill-emacs'
real    0m0.573s
user    0m0.528s
sys     0m0.040s
 

> Any suggestions?

Use emacs, always emacs.


-- 
__Pascal Bourguignon__                     http://www.informatimago.com/
A bad day in () is better than a good day in {}.  
You know you've been lisping too long when you see a recent picture of George 
Lucas and think "Wait, I thought John McCarthy was dead!" -- Dalek_Baldwin

Re: Simple Emacs for rescue or quick edits?

[Hongxu Chen]

"Pascal J. Bourguignon" <pjb@informatimago.com> writes:

> Oleksandr Gavenko <gavenkoa@gmail.com> writes:
>
>> Sometime I need quick small editor. I maintain (in ~/.bashrc):
>>
>>   alias e=emacsclient -a emacs -n
>>
>> for most cases it's enough.
>>
>> But in case of rescue and EDITOR env var running Emacs is not convenient.
>
> Why wouldn't it?  I use enw:
>
> $ cat > ~/bin/enw <<EOF
> #!/bin/bash
> exec emacs -q -nw "$@"
> EOF
> $ chmod 755 ~/bin/enw
> $ export EDITOR=enw
> $ export VISUAL=enw
>
>
> alias e='emacs -q -nw' # works too.
>
> for quick edits.   And when I say quick, I mean quick: almost 1/4 the
> boot time of vim:
>
> [pjb@kuiper :0.0 ~]$ time echo :q |vim
> real    0m2.027s
> user    0m0.016s
> sys     0m0.008s
>
> [pjb@kuiper :0.0 ~]$ time emacs -q -nw -e 'kill-emacs'
> real    0m0.573s
> user    0m0.528s
> sys     0m0.040s

I don't believe the comparison is proper. Shouldn't be written like this?

~ > time vim -u NONE -c 'q'
vim -u NONE -c 'q'  0.01s user 0.01s system 44% cpu 0.045 total
~ > time command emacs -Q -nw -e 'kill-emacs'
command emacs -Q -nw -e 'kill-emacs'  0.11s user 0.05s system 97% cpu 0.165 total

The idea of startup time comparison is not that meaningful though. And
the best way is just what you have mentioned: keep emacs running on.

>  
>
>> Any suggestions?
>
> Use emacs, always emacs.

-- 
Best Regards,
Hongxu Chen

Re: Simple Emacs for rescue or quick edits?

[Teemu Likonen]

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Pascal J. Bourguignon [2013-07-31 00:40:13 +02:00] wrote:

> And when I say quick, I mean quick: almost 1/4 the boot time of vim:
>
> [pjb@kuiper :0.0 ~]$ time echo :q |vim
> real    0m2.027s

> [pjb@kuiper :0.0 ~]$ time emacs -q -nw -e 'kill-emacs'
> real    0m0.573s

You should probably drop caches before running those tests.

    $ sync; sudo sh -c 'echo 3 >/proc/sys/vm/drop_caches'

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Re: Simple Emacs for rescue or quick edits?

[Oleksandr Gavenko]

On 2013-07-31, Pascal J. Bourguignon wrote:

> Why wouldn't it?  I use enw:
>
> $ cat > ~/bin/enw <<EOF
> #!/bin/bash
> exec emacs -q -nw "$@"
> EOF
> $ chmod 755 ~/bin/enw
> $ export EDITOR=enw
> $ export VISUAL=enw
>

I also make another check:

  $ strace emacs -q -nw -e 'kill-emacs' 2>&1 | grep ^open | grep -v ENOENT
  347

  $ strace emacs -Q -nw -e 'kill-emacs' 2>&1 | grep ^open | grep -v ENOENT
  118

  $ strace vim -u NONE -c 'q' 2>&1 | grep ^open | grep -v ENOENT | wc -l
  81

Seems that Debian site-lisp slow down loading of bare emacs. So -Q is another
good suggestion.

Some strange I see in:

  $ strace emacs -Q -nw -e 'kill-emacs' 2>&1 | grep ^open

  203:1294:open("/home/user/.abbrev_defs", O_RDONLY) = 4
  ... 4 times more ...

I don't use abbrev.el. And my ~/.abbrev_defs has a lot of empty:

  (define-abbrev-table 'shell-mode-abbrev-table '(
    ))

Look like suggestion for Emacs improvement (disabling abbrev with -Q).

> alias e='emacs -q -nw' # works too.
>
> for quick edits.   And when I say quick, I mean quick: almost 1/4 the
> boot time of vim:
>
> [pjb@kuiper :0.0 ~]$ time echo :q |vim
> real    0m2.027s
> user    0m0.016s
> sys     0m0.008s
>
> [pjb@kuiper :0.0 ~]$ time emacs -q -nw -e 'kill-emacs'
> real    0m0.573s
> user    0m0.528s
> sys     0m0.040s
>

I check on my system - both really fast (emacs 2 time slower, but who care if
it is 0.04s)!

>> Any suggestions?
>
> Use emacs, always emacs.

I use sh wrapper around "exec emacsclient -a emacs -n". '-n' is essential
part.

But Emacs block itself ever with "emacsclient -n" when you try run:

  M-! emacsclient -n <FILE-OR-DIR> RET  (or M-x shell-command).

With "emacs -Q" I avoid such issue.

-- 
Best regards!

Re: Simple Emacs for rescue or quick edits?

[Luca Ferrari]

On Tue, Jul 30, 2013 at 11:29 PM, Oleksandr Gavenko <gavenkoa@gmail.com> wrote:
> Sometime I need quick small editor. I maintain (in ~/.bashrc):
>
>   alias e=emacsclient -a emacs -n
>
> for most cases it's enough.
>
> But in case of rescue and EDITOR env var running Emacs is not convenient.
>
> I look to jove and zile:
>
>   http://www.emacswiki.org/emacs/ErsatzEmacs
>
> but both have no colours support...
>
> I become think that EDITOR=vim is best option...


mg? Is an emacs-like client but has not all the lisp features.

Luca

Re: Simple Emacs for rescue or quick edits?

[Stefan Monnier]

> mg? Is an emacs-like client but has not all the lisp features.

I think the currently-supported equivalent is Zile.  It's not "the real
thing" but when working on a 4MB home router, it's a pretty
good approximation.


        Stefan