[Bug 701535] Re: Add an xpath evaluator script

[Adrian Wilkins]

** Attachment added: "Improved version with more switches"
   https://bugs.launchpad.net/ubuntu/+source/libxml-libxml-perl/+bug/701535/+attachment/4527886/+files/xpath2

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https://bugs.launchpad.net/bugs/701535

Title:
  Add an xpath evaluator script

Status in libxml-libxml-perl package in Ubuntu:
  New

Bug description:
  Binary package hint: libxml-libxml-perl

  libxml-xpath-perl supplies /usr/bin/xpath as a means to extract nodes using XPath
  on the command line.

  XML::XPath is very slow, so this script is too.

  Patching this script to use XML::LibXML instead produces a > 10x
  speedup.

  Very little effort is required as XML::LibXML tries hard to replicate the API of
  XML::XPath

  Test query run over an 8MB XML file :

  /usr/bin/xpath : 30.8s real time
  /usr/bin/xpath2 :  2.2s real time

  Need I say more?

  Enclosed my hasty port of the original script with a few comments.

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