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Top Forums Shell Programming and Scripting How to extract xml attribute values using awk inline.? Post 302974862 by kchinnam on Sunday 5th of June 2016 01:52:34 AM
Old 06-05-2016
I have SuSe Linux 11 VM with 8GM RAM(300 MB free) 2 CPU cores.

Code:
# XML has 151 matching xml nodes(lines)
 perl -nle '/<factories.*baseQueueName/ and @r=/(?:jndiN|baseQueueN|n)ame="([^"]+)/g and print join ",",@r[1,2,0]' resources.xml | wc -l
151

# I did two tests with the same script you tried on your end.
perl results:
real    0m0.008s	real    0m0.008s  
user    0m0.007s  	user    0m0.007s
sys     0m0.002s	sys     0m0.002s

awk results:
real    0m0.066s  	real    0m0.026s
user    0m0.026s    user    0m0.007s
sys     0m0.001s	sys     0m0.002s

Original script results:
real    0m0.997s    real    0m1.102s
user    0m0.621s    user    0m0.644s
sys     0m0.680s	sys     0m0.690s


Last edited by kchinnam; 06-05-2016 at 02:54 AM.. Reason: text formatting
 

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SAX::PurePerl(3)					User Contributed Perl Documentation					  SAX::PurePerl(3)

NAME
XML::SAX::PurePerl - Pure Perl XML Parser with SAX2 interface SYNOPSIS
use XML::Handler::Foo; use XML::SAX::PurePerl; my $handler = XML::Handler::Foo->new(); my $parser = XML::SAX::PurePerl->new(Handler => $handler); $parser->parse_uri("myfile.xml"); DESCRIPTION
This module implements an XML parser in pure perl. It is written around the upcoming perl 5.8's unicode support and support for multiple document encodings (using the PerlIO layer), however it has been ported to work with ASCII/UTF8 documents under lower perl versions. The SAX2 API is described in detail at http://sourceforge.net/projects/perl-xml/, in the CVS archive, under libxml-perl/docs. Hopefully those documents will be in a better location soon. Please refer to the SAX2 documentation for how to use this module - it is merely a front end to SAX2, and implements nothing that is not in that spec (or at least tries not to - please email me if you find errors in this implementation). BUGS
XML::SAX::PurePerl is slow. Very slow. I suggest you use something else in fact. However it is great as a fallback parser for XML::SAX, where the user might not be able to install an XS based parser or C library. Currently lots, probably. At the moment the weakest area is parsing DOCTYPE declarations, though the code is in place to start doing this. Also parsing parameter entity references is causing me much confusion, since it's not exactly what I would call trivial, or well documented in the XML grammar. XML documents with internal subsets are likely to fail. I am however trying to work towards full conformance using the Oasis test suite. AUTHOR
Matt Sergeant, matt@sergeant.org. Copyright 2001. Please report all bugs to the Perl-XML mailing list at perl-xml@listserv.activestate.com. LICENSE
This is free software. You may use it or redistribute it under the same terms as Perl 5.7.2 itself. perl v5.12.1 2008-08-05 SAX::PurePerl(3)
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