DITA-OT XSLT stylesheet performance optimization #2

after.xsl

<?xml version="1.0" encoding="utf-8"?>

<xsl:stylesheet version="2.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:xs="http://www.w3.org/2001/XMLSchema"
  exclude-result-prefixes="xs">

  <xsl:output method="xml" indent="yes"/>

  <xsl:template match="topicref[contains(@class, ' map/topicref ')][last()]">
    <xsl:message><xsl:value-of select="count(preceding::topicref[contains(@class, ' map/topicref ')])"/></xsl:message>
  </xsl:template>

</xsl:stylesheet>

<!-- *** Average execution time over last 1 runs: 53.014472s (53014.472349ms) -->

before.xsl

<?xml version="1.0" encoding="utf-8"?>

<xsl:stylesheet version="2.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:xs="http://www.w3.org/2001/XMLSchema"
  exclude-result-prefixes="xs">

  <xsl:output method="xml" indent="yes"/>

  <xsl:template match="*[contains(@class, ' map/topicref ')][last()]">
    <xsl:message><xsl:value-of select="count(preceding::*[contains(@class, ' map/topicref ')])"/></xsl:message>
  </xsl:template>

</xsl:stylesheet>

<!-- *** Average execution time over last 1 runs: 7m 43.372111s (463372.11177ms) -->