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Date:	Thu, 26 Apr 2012 23:18:19 -0400
From:	"Larry Hall (Cygwin)" <reply-to-list-only-lh AT cygwin DOT com>
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Subject:	Re: bad performance when opening many files on Win7
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On 4/26/2012 4:47 PM, Achim Gratz wrote:
>
> I've seen major performance regressions on Win7 compared to an pre-1.7
> Cygwin version on Win2000.  I had initially suspected the virus scanner
> and disabling the real-time scan for the whole Cygwin folder did improve
> things appreciably.  However the real performance hit when an
> application opens or even just stats many files in succession (like Perl
> is prone to at startup when it scans @INC) is still there.
>
> Superficially it looks like you get 100% load on one CPU and the
> application is busy, but perfmon tells you that the application sits on
> its thumbs and the CPU is eaten by lsass.exe (which doesn't have any
> file open or any network connection).  Eventually the application starts
> doing what it is supposed to do, but lsass continues to eat CPU for a
> few minutes.  I'm not even sure there's if it only happens for Cygwin
> applications, but for those I can reliably reproduce it.  When I time
> the application in Cygwin, I get something like less than a second user
> time and over two minutes core time.
>
> If someone has seen something like that and maybe there is some setup
> that I can tweak to avoid this it would be great to know.

Here's some background.

<http://www.suacommunity.com/forum/tm.aspx?m=1697&mpage=1>

Anything there describe your setup?


-- 
Larry

_____________________________________________________________________

A: Yes.
 > Q: Are you sure?
 >> A: Because it reverses the logical flow of conversation.
 >>> Q: Why is top posting annoying in email?

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