Why does copy transform take so long?

[Edward L. Knoll]

We are working through some performance issues and I thought I'd check 
how long a simple copy transformation (copy input XML to output XML) 
takes.  It's taking much longer than we expected.   At this point, we're 
wondering if we're missing something in the setup or execution of our 
XSL processing.

I'm running on a Sun/Solaris platform.  We're running Xalan-J 2.4 and 
JDK 1.4.  Our Java program does the following:
- loads the XSL style sheet into a javax.xml.transform.Templates,
- loads the XML file into a javax.xml.transform.dom.DOMSource
- transforms the DOMSource into a javax.xml.transform.dom.DOMResult
 using javax.xml.transform.Transformer
- serializes the DOMResult to an output file using 
org.apache.xml.serializer.Serializer

The core template we're using for the copy is the following:
<xsl:template name="CopyAll" match="*">
   <xsl:copy>
      <xsl:copy-of select="@*" />
      <xsl:apply-templates />
   </xsl:copy>
</xsl:template>
Following is a breakdown on the performance:
- loading the stylesheet : 1.7 seconds
- loading XML file : 0.3 seconds
- creating Transform instance from Transforms: <0.1 seconds
- serializing to output file: 0.4 seconds
- executing copy transform: 2.1 seconds
Characteristics of the input XML file:
- LineCount: 9678
- ByteCount: 494668
- TotalElementCount: 8795
--
Edward L. Knoll   Phone (FedEx)     : (719)484-2717
                 e-mail (FedEx)    : [EMAIL PROTECTED]
                 e-mail (personal) : [EMAIL PROTECTED]

---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]