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Date: Wed, 29 Apr 2009 23:22:31 -0400
From: "Larry Hall (Cygwin)" <reply-to-list-only-lh AT cygwin DOT com>
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To: cygwin AT cygwin DOT com
Subject: Re: Can cygwin boot faster?
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Lenik wrote:
> I feel it has been slightly faster in cygwin-1.7 than cygwin-1.6. But it 
> is still very slow compared to msys-1.10.  What does cygwin indeed 
> execute when start up? Is it loaded too much, for example the network 
> libraries? I noticed that paths leading with two slashes '//', which is 
> often created by path join functions, for example $prefix/somewhere, 
> when $prefix points to the root "/". When such paths (//...) are 
> accessed, cygwin seems to treat it as some kind of URL and halt for 
> several seconds, while msys always merge the duplicated slashes to '/...'.

<http://cygwin.com/faq/faq-nochunks.html#faq.using.slow>

Don't read too much into the "suddenly" part.  The FAQ has been around for
a while.

> Because of the slow speed, when I'm programming with cygwin, I will 
> carefully to invoke command calls to the cygwin executables, to reduce 
> the start up cost. for example, if I want to uppercase a string, I will 
> do it in 26 built-in variable expansion as:
>     VAR="${VAR//a/A}"
>     VAR="${VAR//b/B}"
>     VAR="${VAR//c/C}"
>     ...
>     VAR="${VAR//z/Z}"
> rather then by simply execute:
>     VAR=$(echo $VAR | tr [a-z] [A-Z])

<snip>

Others on the list may have specific ideas for you to apply but as a rule
of thumb, you should limit process creation if performance is a prime
concern.  Windows is less efficient with process creation/management than
Linux.

-- 
Larry Hall                              http://www.rfk.com
RFK Partners, Inc.                      (508) 893-9779 - RFK Office
216 Dalton Rd.                          (508) 893-9889 - FAX
Holliston, MA 01746

_____________________________________________________________________

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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