Subject: Re: [xsl] Here's how to benchmark your XSLT program's execution time From: "Eliot Kimber ekimber@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Thu, 6 Nov 2014 17:09:10 -0000 |
Here's my test: <?xml version="1.0" encoding="UTF-8"?> <xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:df="http://dita2indesign.org/dita/functions" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:relpath="http://dita2indesign/functions/relpath" xmlns:glossdata="http://dita4publishers.org/glossdata" xmlns:applicability="http://dita4publishers.org/applicability" xmlns:mapdriven="http://dita4publishers.org/mapdriven" xmlns:local="urn:functions:local" xmlns:index-terms="http://dita4publishers.org/index-terms" xmlns:date="java:java.util.Date" xmlns:enum="http://dita4publishers.org/enumerables" exclude-result-prefixes="local xs df xsl relpath glossdata date"> <xsl:template match="/" name="start"> <xsl:variable name="startTime" select="date:getTime(date:new())"/> <xsl:message> + [DEBUG] Start time: <xsl:value-of select="$startTime"/> milliseconds</xsl:message> <xsl:for-each select="1 to 100000000"> <xsl:variable name="foo" select="."/> <xsl:sequence select="$foo"/> </xsl:for-each> <xsl:variable name="endTime" select="date:getTime(date:new())"/> <xsl:message> + [DEBUG] End time: <xsl:value-of select="$endTime"/> milliseconds</xsl:message> <xsl:variable name="elapsed" as="xs:integer" select="$endTime - $startTime"/> <xsl:message> + [DEBUG] Elapsed time: <xsl:value-of select="$elapsed div 1000"/> seconds</xsl:message> </xsl:template> </xsl:stylesheet> Which produces this result for me when run from Oxygen: + [DEBUG] Start time: 1415293570616 + [DEBUG] End time: 1415293596900 + [DEBUG] Elapsed time: 26.284 seconds Cheers, E. bbbbb Eliot Kimber, Owner Contrext, LLC http://contrext.com On 11/6/14, 9:05 AM, "Costello, Roger L. costello@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: >> 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>
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