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Full Discussion: BASH: Script jams Cygwin to 100% CPU -
Top Forums Shell Programming and Scripting BASH: Script jams Cygwin to 100% CPU - Post 302455323 by pludi on Tuesday 21st of September 2010 09:23:20 AM
Old 09-21-2010
Quote:
Originally Posted by SilversleevesX
Eight calls at once is indeed heavy loading. Especially with Cygwin, which handles that sort of thing pißß-poorly anyway, it's well-known.
Small correction here: the problem ain't Cygwin, it's Windows. UNIX software (including that running inside Cygwin) relies heavily on the fact that a fork() is a fast process spawning call. On Windows, however, creating a new process is something very very slow, compared to creating a new thread, which is the preferred model for Microsoft. Since each subshell is a fork+exec, combined with slow process creation... well, you've seen the results.
 

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LEARN ABOUT DEBIAN

file::spec::cygwin

File::Spec::Cygwin(3pm) 				User Contributed Perl Documentation				   File::Spec::Cygwin(3pm)

NAME

       File::Spec::Cygwin - methods for Cygwin file specs

SYNOPSIS

	require File::Spec::Cygwin; # Done internally by File::Spec if needed

DESCRIPTION

       See File::Spec and File::Spec::Unix.  This package overrides the implementation of these methods, not the semantics.

       This module is still in beta.  Cygwin-knowledgeable folks are invited to offer patches and suggestions.

       canonpath
	   Any "" (backslashes) are converted to "/" (forward slashes), and then File::Spec::Unix canonpath() is called on the result.

       file_name_is_absolute
	   True is returned if the file name begins with "drive_letter:", and if not, File::Spec::Unix file_name_is_absolute() is called.

       tmpdir (override)
	   Returns a string representation of the first existing directory from the following list:

	       $ENV{TMPDIR}
	       /tmp
	       $ENV{'TMP'}
	       $ENV{'TEMP'}
	       C:/temp

	   Since Perl 5.8.0, if running under taint mode, and if the environment variables are tainted, they are not used.

       case_tolerant
	   Override Unix. Cygwin case-tolerance depends on managed mount settings and as with MsWin32 on GetVolumeInformation() $ouFsFlags ==
	   FS_CASE_SENSITIVE, indicating the case significance when comparing file specifications.  Default: 1

COPYRIGHT

       Copyright (c) 2004,2007 by the Perl 5 Porters.  All rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.14.2							    2010-09-20						   File::Spec::Cygwin(3pm)
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