[xsl] performance of copying all source to result

Subject: [xsl] performance of copying all source to result
From: Evyatar_Kafkafi <evyatar@xxxxxxxxx>
Date: Thu, 21 Dec 2000 11:24:20 +0200
I use an XSL stylesheet to copy (almost) all the source document to the
result, doing some small modifications on a small portion of the elements.
The stylesheet I use is similar to the one posted in
http://www.dpawson.co.uk/xsl/N1930.html#N15209 (It is added in the end of
this message). Basically, it goes over all nodes.
My source documents are relatively small (1 KB - 4 KB).

The question is - how long will it take (at run-time) to do this
transformation?

My measurements show it will be more then 1.6 seconds (1600 milliseconds).

I compared some combinations of the following XSLT processors: Xalan2,
Xalan1.2, Saxon 6.0.2, XT and the following parsers: Xerces, XP, Sun,
Aelfred. I run several times (the first time always takes more, about 4
seconds). I use the compiled stylesheet.

The results were all between 1.6 seconds and 2.1 seconds.

But I would like to get a result of about 0.5 seconds for a transformation.
Therefore I suspect it is the stylesheet that should be improved, not the
XSLT processor.

Any suggestions?

	Evyatar.


The stylesheet:

<xsl:stylesheet 
    version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:output method="xml" indent="yes" omit-xml-declaration="yes">

<xsl:template match="/">
  <xsl:apply-templates/>
</xsl:template>

<xsl:template match=" a | applet | b | big | body | br | caption | 
    cite | code | col | colgroup | dd | div | dl | dt | em | font | 
    form | frame | frameset | head | h1 | h2 | h3 | h4 | h5 | h6 | hr | 
    html | i | iframe | img | link | li | map | meta | noframes | ol | 
    p | param | pre | s | script | small | span | strong | style | 
    sub | sup | td | th | title | tr | tt | ul | var | table ">
    <xsl:copy>
    <xsl:copy-of select="@*"/>
    <xsl:apply-templates/>
  </xsl:copy>
</xsl:template>

<!-- ADD YOUR template here -->

</xsl:output>
</xsl:stylesheet>


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