Subject: Re: xsl:key vs DTD ID attribute Performance issue From: Scott_Boag@xxxxxxxxx Date: Fri, 1 Dec 2000 17:34:30 -0500 |
Using ID should be faster on most implementations. -scott "Melvyn Rosengarden" <melrose@xxxxxxxxxxxx To: <xsl-list@xxxxxxxxxxxxxxxx> .com> cc: (bcc: Scott Boag/CAM/Lotus) Sent by: Subject: xsl:key vs DTD ID attribute Performance issue owner-xsl-list@mulber rytech.com 11/30/00 06:28 PM Please respond to xsl-list I am currently exploring all options available to me to improve XSLT Transform performance. I am trying to evaluate the difference between using a DTD ID type attribute or an XSLT key with a "static" XML file whose resultant DOM is cached for reuse. I am postulating that since an ID attribute is defined in the DTD, when the XML is parsed to an input tree an internal index table is built mapping the ID to the node's memory address, resulting in the fastest possible navigation. On the otherhand since the <xsl:key..../> is defined as a top level element of the stylesheet I would imagine that every time the stylesheet is used it must traverse the entire DOM to build it's index table, resulting a poorer overall performance. Would someone knowledgeable about the inner workings of the transform engine be generous enough to comment.... Thanks.. "You already have zero privacy -- get over it !! Melvyn Rosengarden melrose@xxxxxxxxxxxxxxxx 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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