Mail Archives: cygwin/2009/04/29/23:24:34
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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