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RE: Processing Efficiently

2005-06-09 00:51:15
By aggressive size reduction you can set also the indend to "no" - the
result is a small bit smaller, but this optimization is "for free":
<xsl:output method="xml" indent="no" encoding="utf-8"/>

tomi


-----Original Message-----
From: Karl Stubsjoen [mailto:kstubs(_at_)gmail(_dot_)com] 
Sent: Wednesday, June 08, 2005 9:34 PM
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: Re: [xsl] Processing Efficiently

I had to all ready reduce the size of the XML quite a bit by sheer
element renaming and elination of unused elements.  $s use to be 25MB,
but by eliminating unused elements (really needed 2) and by renaming
"xlsRow" to "R" and "xlsColumn" to "C" and by renaming the attribute
"column" to "c" I was able to reduce the size by 1/3.

The thing is this:  $s is my master doc, contains the lookup records. 
I have many individual docs that will be compared agains $s, and these
files range in size from 20KB to 5MB (appx.).  I don't mind a different
approach (for example reducing $s source).  I'm just curious how others
would approach something like this.  How would you arrange such
documentation for this sort of processing?

The scenario is:
Large data file for lookups / validation (10 to 20MB) Individual data
files (up to 5MB) As individual data files refresh, identify those items
that exist in the master list.  Again, this is a topic of "Performance"
and "Best Practice" for peforming frequent validations of documents this
size.



On 6/8/05, tomas(_dot_)vanek(_at_)accenture(_dot_)com 
<tomas(_dot_)vanek(_at_)accenture(_dot_)com> wrote:
using keys could help to speed up the transformation (here is just the
idea):

...
       <xsl:key name="summaryInvoice"
use="document('summary.xml')//xls/R" match="C[(_at_)c='I']"/>

...
       <xsl:template match="xlsRow">
               <xsl:variable name="current_invoice"
select="xlsColumn[(_at_)column='Invoice_#']"/>
               <xsl:variable name="current_balance"
select="key('summaryInvoice', $current_invoice)/C[(_at_)c='B']"/>
               <xsl:variable name="diff_balance"
select="$current_balance - xlsColumn[(_at_)column='Balance']"/>
...

tomi


-----Original Message-----
From: Karl Stubsjoen [mailto:kstubs(_at_)gmail(_dot_)com]
Sent: Wednesday, June 08, 2005 10:08 AM
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] Processing Efficiently

Hello,
I would like to optimize the following:

Where $s is a 5MB document and the source document is app 2-5MB.
The goal:  copy everything in the source that exists in $s.
Catch:  need to know the value of the balance in $s.

$s looks like:
<xls>
<R row="2">
 <C c="I">2AA9379</C><!-- match value "invoice" -->
 <C c="B">-127.5</C><!-- this is the balance --> </R> ...
</xls>

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:output method="xml" indent="yes" encoding="utf-8"/>

<xsl:variable name="s"
select="document('summarydata/summaryreduced.xml')//xls/R"/>

<xsl:template match="/">
<result>
<xsl:apply-templates
select="xls/xlsRow[xlsColumn[(_at_)column='Invoice_#']=$s/C[(_at_)c='I'] |
xlsColumn[(_at_)column='Balance'][not(.= $s/C[(_at_)c='B'])]]"/> </result>
</xsl:template>

<xsl:template match="xlsRow">
<xsl:variable name="current_invoice"
select="xlsColumn[(_at_)column='Invoice_#']"/>
<xsl:variable name="current_balance"
select="$s[C[(_at_)c='I']=$current_invoice]/C[(_at_)c'B']"/>
<xsl:variable name="diff_balance" select="$current_balance -
xlsColumn[(_at_)column='Balance']"/> <xsl:copy> <xsl:apply-templates
select="@*"/> <xsl:attribute name="current_balance"><xsl:value-of
select="$current_balance"/></xsl:attribute>
<xsl:attribute name="diff_balance"><xsl:value-of
select="$diff_balance"/></xsl:attribute>
 <xsl:apply-templates select="xlsColumn"/> </xsl:copy> </xsl:template>

<xsl:template match="@*">
<xsl:copy>
 <xsl:apply-templates select="@*"/>
</xsl:copy>
</xsl:template>

<xsl:template match="xlsColumn">
<xsl:copy-of select="."/>
</xsl:template>

</xsl:stylesheet>

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