Re: document() in xsl:variable -> low performance

[Christopher Painter-Wakefield]

Ouch!  I make heavy use of the document() function for aggregation.
Sitemap aggregation would be a pain to maintain, because the stuff I need
to aggregate comes rather late in the pipeline (layout information),
whereas the generation and early transformation steps can vary a lot.
XInclude/CInclude could work, but I like the cleanness and flexibility of
using the document() function.

Does it help any to take another variable on some subtree of the variable?

Does it make a difference if you use xsltc?

-Christopher




|---------+---------------------------->
|         |           Joerg Heinicke   |
|         |           <[EMAIL PROTECTED]|
|         |           mx.de>           |
|         |                            |
|         |           05/02/2004 05:50 |
|         |           PM               |
|         |           Please respond to|
|         |           users            |
|         |                            |
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  |       Subject:  Re: document() in xsl:variable -> low performance                  
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On 02.05.2004 23:37, Nils wrote:

> Hello,
>
> In a stylesheet, I have this in the first line, outside of any template:
>
> <xsl:variable name="lang"><xsl:value-of
> select="document('cocoon:/getxml')/context/lang"/></xsl:variable>
>
> In the templates of this xsl I use the variable $lang about 40 times. The
> procession of this stylesheet is very slow.
>
> When I reduce the use of the variable $lang to one or none, it's very
fast.
> When I use "en" (without quotes) instead of <xsl:value-of
> select="document('cocoon:/getxml')/context/lang"/> it's very fast, as
well.
>
> --> Does that mean, that everytime I use $lang cocoon executes
> document('cocoon:/getxml') ??

Yes, that's a "feature" of Xalan.
http://issues.apache.org/bugzilla/show_bug.cgi?id=2425
http://issues.apache.org/bugzilla/show_bug.cgi?id=4257

> --> How can I avoid that?

Don't use document(). Include the document in the sitemap by using
sitemap aggregation (if it is a fixed number of known files) or x/cinclude.

Joerg

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