Subject: Re: [xsl] Here's how to benchmark your XSLT program's execution time From: "Costello, Roger L. costello@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Thu, 6 Nov 2014 15:05:32 -0000 |
> Order of evaluation is undefined in XSLT, and there is no guarantee > that $start is evaluated before the apply-templates call is evaluated. Yikes! So how do I write the XSLT program so that it is guaranteed that $start will be evaluated before the apply-templates call is evaluated? /Roger -----Original Message----- From: Michael Kay mike@xxxxxxxxxxxx [mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx] Sent: Thursday, November 06, 2014 9:49 AM To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx Subject: Re: [xsl] Here's how to benchmark your XSLT program's execution time If this is working, then it's only by chance. Order of evaluation is undefined in XSLT, and there is no guarantee that $start is evaluated before the apply-templates call is evaluated. I think this only works in Saxon because the optimizer treats calls on extension functions as suspicious, and tries to avoid over-optimizing them because of potential side-effects. Michael Kay Saxonica mike@xxxxxxxxxxxx +44 (0) 118 946 5893 On 6 Nov 2014, at 10:20, Costello, Roger L. costello@xxxxxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > Hi Folks, > > So, you've got an XSLT program that is taking a long time to execute. You want to find out what part of the program is taking so much time. You need to insert some start/stop timers into your XSLT. Here's how to do it: > > <?xml version="1.0" encoding="UTF-8"?> > <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" > xmlns:date="java:java.util.Date" > version="2.0"> > > <xsl:output method="text" /> > <xsl:output name="text-format" method="text"/> > > <xsl:template match="/"> > <!-- Start a timer --> > <xsl:variable name="start" select="date:getTime(date:new())" /> > > <!-- Do your XSLT processing --> > <xsl:apply-templates /> > > <!-- End the timer --> > <xsl:variable name="end" select="date:getTime(date:new())" /> > > <!-- Log the benchmarking results to a file, time-info.txt --> > <xsl:result-document href="time-info.txt" format="text-format"> > start: <xsl:value-of select="$start" /> > end: <xsl:value-of select="$end" /> > diff: <xsl:value-of select="$end - $start" /> > </xsl:result-document> > > </xsl:template> > > <xsl:template match="*"> > <!-- Do something --> > <xsl:text>Hello World </xsl:text> > <xsl:value-of select="current-dateTime()" /> > </xsl:template> > > </xsl:stylesheet>
Current Thread |
---|
|
<- Previous | Index | Next -> |
---|---|---|
Re: [xsl] Here's how to benchmark y, Eliot Kimber ekimber | Thread | Re: [xsl] Here's how to benchmark y, Michael Kay mike@xxx |
Re: [xsl] Here's how to benchmark y, Michael Kay mike@xxx | Date | Re: [xsl] Here's how to benchmark y, Michael Kay mike@xxx |
Month |