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Re: [xsl] Here's how to benchmark your XSLT program's execution time


Subject: Re: [xsl] Here's how to benchmark your XSLT program's execution time
From: "Wolfgang Laun wolfgang.laun@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 6 Nov 2014 17:09:56 -0000

On 6 November 2014 17:38, Eliot Kimber ekimber@xxxxxxxxxxxx <
xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:

> In my test I followed the xsl:variable instruction by an immediate
> xsl:message with a reference to the variable to ensure it was evaluated
> right then.
>

...and that this xsl:message's duration is added to $end-$start. (Yes, you
can try to cook this, too.)

-W








>
> Cheers,
>
> E.
> ----------
> Eliot Kimber, Owner
> Contrext, LLC
> http://contrext.com
>
>
>
>
> On 11/6/14, 8:49 AM, "Michael Kay mike@xxxxxxxxxxxx"
> <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> >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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