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Date:	Wed, 12 Sep 2012 08:17:49 +0200
From:	Sven Severus <s DOT severus AT hima DOT com>
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Subject:	RE: Buffering problem in netcat server script
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Adam Dinwoodie wrote:
> From `mad sed`:
> 
>     -u, --unbuffered
> 
>         load minimal amounts of data from the input files and flush the output
>         buffers more often
> 
> If you add the -u option, sed will buffer less and write to the pipe more
> often.  I would guess this isn't the default as it's less efficient, but
> haven't done anything to verify that.
> 
> I believe `cat` never buffers, but I base this on nothing but instinct.
> 
> A quick experiment on my handy RHEL box implies this is not Cygwin specific;
> the following command shows buffering behaviour too:
> 
>     tail -f tmpfile | sed 's/e/E/g' | tee outfile
> 
> (I'm using the pipelines so I can see what's going on without sed thinking
> stdin or stdout are a terminal.)

Thanks a lot for your reply.

Sven

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