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: "Eliot Kimber ekimber@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 6 Nov 2014 16:37:27 -0000
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.

Cheers,

E.
bbbbb
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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