Hum, part of my e-mail is missing, see below:
> > Registered RTFs are then freed on every exit of xsltApplyOneTemplate().
> > This means that the lifetime of RTFs is managed by Libxslt itself. This
> > might be also the reason why there's no "free" function for RTFs yet.
> A note about this: the lifetime of created RVTs used to give me tremendous
> resource
> problems in the past, though admittedly probably a rare situation. I had an
> extension
> function that would return > database results as RVTs. The fact that they
> were only
> freed once leaving a template forced me to dramatically suboptimally re-write
> the
> XSLT to reduce the overhead generated. Where I wanted to > do:
> <xsl:template match="something">
> <xsl:for-each select="my:sql-many-results-func()/results/row">
> <xsl:for-each select="my:some-other-sql-query('some query using the
> previous row'">
> </xsl:template>
What I had to do was:
<xsl:template match="something">
<xsl:apply-templates select="my:sql-many-results-func()/results/row"/>
</xsl:template>
<xsl:template match="row">
<xsl:apply templates select="my:some-other-sql-query('some query using the
previous row')" mode="mode2"/>
</xsl:template>
<xsl:template match="row" mode="row2">
</xsl:template>
> Not really the best example, but had a few downsides:
> 1. required template matching to work on RVTs (actually RVTs converted to
> node-sets like exsl:node-set() would do), which I think is against any spec
> but Daniel always made it work
> 2. sometimes created some very ugly/verbose stylesheets
> 3. still sometimes tough to reduce the memory overhead for large RVTs
> returned.
> I remember trying for a long time to improve the granularity such that RVTs
> created
> within <xsl:for-each> and other instructions , underneath elements within a
> template, or generally anywhere a variable would no longer be in scope would
> be
> freed when you leave that boundary. I could never get it to work properly
> but I
> 'm sure it's possible.
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