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Date: Thu, 20 Aug 2020 14:50:11 +0200
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: Peter Dons Tychsen <donpedro@tdcadsl.dk>
Subject: Re: Synchronization problem with posix_spawn
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On Aug 20 07:40, Peter Dons Tychsen via Cygwin wrote:
> Hi Corinna,
> 
> > spawn alone doesn't cut it, due to the requirement to support the
> > additional file actions and spawn atributes POSIX defines.  This
> > would require a revamp of Cygwin's spawn functionality, which is
> > already quite complicated.  So this is something I'm only willing
> > to do in homeopathic doses.
> 
> OK. I can see that most of the processing of the options are done
> seperately. We could to start with create a shortcut that calls
> spawn[vpe]() instead if there are no options specified? That would
> speed up most cases. Then we could add the extra cases later if needed.
> 
> Would that be an acceptable patch? 

No, it won't work as expected, as you can see from the discussion in
this thread.  Some internal work would be required.

> The reason i am pushing for this is that allot of developers i interact
> with get the feeling cygwin is slow.

Well, Cygwin *is* slow, given the fork/exec implementation.  We asked
Microsoft a lot if there's any chance to create a fork-alike working in
the Windows subsystem, but that ship has sailed.


Corinna

-- 
Corinna Vinschen
Cygwin Maintainer
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