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Date: Wed, 08 Jan 2003 10:13:33 -0800
To: cygwin@cygwin.com
From: Randall R Schulz <rrschulz@cris.com>
Subject: RE: Slowness when setting PS1 variable???
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Thomas,

The key here is that back-quotes or $( command ) uses a pipe to get the 
output of the command.

Do you run a CPU-soaking background program such as SETI@home, Folding@home 
(the protein folding experiment) or fightAIDS@home (the AIDS drug discovery 
program)?

If so, you're seeing the result of the changes to how Cygin accesses pipes 
in 1.3.18.

I hope these changes will be perfected or backed out, since I don't want to 
give up running background CPU utilization software and in the long run I 
cannot afford to stop updating Cygwin (of course).

Randall Schulz


At 06:35 2003-01-08, Thomas Chadwick wrote:
>Update.  I've further observed that while running whoami at the 
>command-line returns a result immediately, running it inside a pair of 
>back-tics "`" shows the blocking behavior.  For instance, if I do this:
>
>$ whoami
>
>I get a result immediately.
>
>However, if I do this:
>
>$ echo `whoami`
>
>It takes a good 5-10 seconds to print a value and return the prompt.


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