Re: [Notion-devel] Number of processes created by notion when launching external applications

[Juri H. <ju...@fa...>]

Hi there,

On 02/24/12 at 08:13pm, Ranousse wrote:
> 
> I've just noticed that when pressing F2 to launch a terminal, notion
> creates 3 processes
> 1) sh
> 2) xterm
> 3) zsh (my default shell)
> 
> In this case it would be better to have only 2) and 3).
> 
> I compared this to
>                            system( "xterm" )
> in C, and obtained the same number processes (three).
> So I guess notion uses system to launch external applications (I did not
> check).
> 
> The problem is the same with F3
> F3 xpdf => 2 processes (sh and xpdf)
> F3 :mutt => 3 processes (sh, xterm and mutt)

Curious, byt I can't confirm an additional sh process while starting
an application over F3 without ion-runxterm (:).

I also can't confirm any additional sh process if I fire up my terminal over F2:

│     ├─ /usr/local/bin/notion
│     │  ├─ urxvt
│     │  │  └─ zsh


However if starting mutt with F3 :mutt (ion-runxterm) I get an sh process.

├─ urxvt -T mutt -e /usr/local/share/notion/ion-runinxterm -phase2 mutt
│     │  │  └─ /bin/sh /usr/local/share/notion/ion-runinxterm -phase2 mutt
│     │  │     └─ mutt

> 
> When I discovered this, it surprised me a little since I already did
> checks like this in the past and never noticed the unnecessary sh
> processes. And indeed I did not have the problem in the past.
> A that time I used a Debian etch where sh was a linked to bash.
> After bash -c xpdf, you only have once process xpdf.
> But now (Debian squeeze) sh points to dash, and after dash -c xpdf,
> there are two processes (sh and xpdf).
> The difference seems to be that bash is able to optimize a little the
> number of processes in case there's only one process after the -c
> (adding I guess a king of exec).
> 
> For information, vim which also allows to run external applications in
> the same ways as notion F3 key does not create the unecessary processes
> (even with the change for sh from bash to dash).
> 
> Not sure it's very important. But maybe it could interest you.
> (after all it means that the number of processes of a notion user is
> almost multiplied by 2).
> 
> 
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Regards

-- 
Juri Hamburg
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