Transforming memory grows (Xalan-C)

[Holger Floerke <fl...@doctronic.de>]

I have a complex stylesheet using a small input (2MB) to generate a bigger 
(but not so big) output (20MB). Applying this Stylesheet allocates 260MB of 
memory. I found most of the memory can be saved, if I use a special form of 
"xsl:with-param".

Take *big* XML-Document an apply with testXSLT the stylesheet appended.

If I use
         <xsl:with-param name="arg1">
           <xsl:value-of select="substring(.,2)"/>
         </xsl:with-param>
to pass the parameter the memory grows while transorming.

If I use
         <xsl:with-param name="arg1" select="substring(.,2)"/>
the memory does not grow.

Is this a general problem? The Stylesheet still uses 80MB of memory.

HolgeR


<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                 version="1.0">

   <xsl:output method="xml"/>

   <xsl:template match="*">
     <xsl:copy>
       <xsl:copy-of select="@*"/>

       <xsl:call-template name="foo">
         <!-- no memory grow
         <xsl:with-param name="arg1" select="substring(.,2)"/>
         -->
         <!-- memory grow -->
         <xsl:with-param name="arg1">
           <xsl:value-of select="substring(.,2)"/>
         </xsl:with-param>
       </xsl:call-template>

       <xsl:apply-templates/>
     </xsl:copy>
   </xsl:template>

   <xsl:template name="foo">
     <xsl:param name="arg1"/>
     <xsl:value-of select="$arg1"/>
   </xsl:template>

   <xsl:template match="text()">
     <xsl:copy/>
   </xsl:template>
</xsl:stylesheet>


-- 
holger floerke                     d  o  c  t  r  o  n  i  c
email floerke@doctronic.de         information publishing + retrieval
phone +49 2222 9292 90             http://www.doctronic.de