[xslt] performance: row-col to col-row
- From: Bernhard Zwischenbrugger <bz datenkueche com>
- To: "xslt gnome org" <xslt gnome org>
- Subject: [xslt] performance: row-col to col-row
- Date: Tue, 17 Jun 2003 21:19:47 +0200
Hi all
This is a performance question:
I have an xml that looks like
<row>
<col>1</col>
<col>2</col>
<col>3</col>
<col>4</col>
</row>
<row>
<col>5</col>
<col>6</col>
<col>7</col>
<col>8</col>
</row>
..
In the result I need to structur like:
<col>
<row>1</row>
<row>5</row>
</col>
<col>
<row>2</row>
<row>6</row>
</col>
<col>
<row>3</row>
<row>7</row>
</col>
<col>
<row>4</row>
<row>8</row>
..
It is no problem to do that, but the performance is not really good
with the following stylesheet:
<xsl:for-each select="/row[1]/col">
<xsl:variable name="col">
<xsl:value-of select="position()"/>
</xsl:variable>
<!-- I think the following xpath is slow -->
<xsl:for-each select="/row/col[position()=$col]">
..
</xsl:for-each>
</xsl:for-each>
-----
If I do that in that way the performance is miserable.
Is there an other possibility to that?
The xmls are output of an exslt:sql database query.
Bernhard
http://datenkueche.com
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