Subject: RE: [xsl] Variable or Query for Speed From: "Michael Kay" <michael.h.kay@xxxxxxxxxxxx> Date: Tue, 4 Feb 2003 23:36:28 -0000 |
The only way to find out is to measure it and see: it might well vary from one processor to another. It's unlikely to make a worthwhile difference either way. If you do use a variable, make it a string and not a result tree fragment. That is, write <xsl:variable name="tableName" select="string(@name)"> not <xsl:variable name="tableName"> <xsl:value-of select="@name" /> </xsl:variable> Result tree fragments are very expensive, and you can't rely on them being optimized. Michael Kay Software AG home: Michael.H.Kay@xxxxxxxxxxxx work: Michael.Kay@xxxxxxxxxxxxxx > -----Original Message----- > From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx > [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of > Peter Eschenbrenner > Sent: 04 February 2003 20:49 > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx > Subject: [xsl] Variable or Query for Speed > > > A stylesheet I am working with uses a specific value multiple > times. The tableName it is reading from xml is concatenated > with multiple strings in various for-each loops throughout > the stylesheet. With the current xml document I am working > with, this means the value is used almost 100 times. > > Question: > Is it faster to query the xml file everytime I want that > variable, or to query it once, store it in a variable, and > echo the value of the variable when I need it? > > Use this every time I want the value: > <xsl:value-of select="@name" /> > > > Or define a variable with that value and use the variable each time > instead: > <xsl:variable name="tableName"> > <xsl:value-of select="@name" /> > </xsl:variable> > > <xsl:value-of select="$tableName" /> > > > > Peter E. > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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