Re: [xsl] XPath perfomance in attributes or nodes?

[Peter Davis <pdavis152 at attbi dot com>]

<xsl:key name="project-uid" match="project" use="@uid"/>
<!-- or use="uid" -->
<xsl:template ...>
  <xsl:apply-templates select="key('project-uid',
     '{6A97F258-93A7-4C5E-B712-052130A5208C}')[1]"/>
  <!-- [1] is probably not necessary -->
</xsl:template>

will be much faster than either approach.

On Wednesday 06 March 2002 02:38, Arjé Cahn wrote:
> Hi everyone,
>
> Does anyone have some solid performance figures on using XPath on
> attributes or nodes?
>
> For example, I have the following XML snippet:
>
> 	<projects>
> 		<project uid="{6A97F258-93A7-4C5E-B712-052130A5208C}">
> 			<uid>{6A97F258-93A7-4C5E-B712-052130A5208C}</uid>
> 			<name>The project</name>
> 			<description>This is the project</description>
> 			<startdate>01-01-2002</startdate>
> 		</project>
> 		<project uid="{6A97F258-93A7-4C5E-B712-052130A5208D}">
> 			<uid>{6A97F258-93A7-4C5E-B712-052130A5208D}</uid>
> 			<name>Another project</name>
> 			<description>This is another project</description>
> 			<startdate>02-02-2002</startdate>
> 		</project>
> 	</projects>
>
> And I want to select a <project>.
> Is it faster using XPath
> 	projects/project[uid='{6A97F258-93A7-4C5E-B712-052130A5208C}']
> or
> 	projects/project[@uid='{6A97F258-93A7-4C5E-B712-052130A5208C}']
> or even (but this is not always possible)
> 	projects/project[name='The project']
> ???
>
> I will have about 10000+ items.
>
> Regards,
>
> Arjé Cahn
>
>
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-- 
Peter Davis
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