Re: [xsl] How to output the start execution time and the end execution time?

["G. Ken Holman g.ken.holman@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

At 2014-09-06 09:46 +0000, Costello, Roger L. costello@xxxxxxxxx wrote:
> Hi Folks,
>
> I would like to:
>
> 1. Output the time that my XSLT program starts processing
> 2. Do the processing
> 3. Output the time that my XSLT program finishes processing
>
> This doesn't work:
>
>     <xsl:template match="/">
>         <xsl:value-of select="current-time()" />
>         ... do the processing ...
>         <xsl:value-of select="current-time()" />
>     </xsl:template>

The current time is a static value for the duration of execution of 
the stylesheet.

> What is the correct way to accomplish this?

Outside of XSLT.  Record the time, invoke and execute the stylesheet, 
record the time.

I suggestion you also take the time (so to speak) to run your input 
data through the following stylesheet:

===8<---
<?xml version="1.0" encoding="US-ASCII"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
                version="2.0">

<xsl:template match="/">
  <xsl:copy-of select="."/>
</xsl:template>

</xsl:stylesheet>
===8<---

... and take that duration away from your execution duration so that 
you have accommodated the time to build the input tree and serialize 
an output tree (even if the output tree won't be identical at least 
you'll get some time accommodated).  That time is separate from your 
logic processing time.

If you have the chance to run your "... do the processing ..." 
multiple times, say 100 times, and then divide the execution time by 
100 that might give you some accuracy (then, again, perhaps not if 
the optimization precludes some execution for 99 times).

I hope this helps.

. . . . . . . Ken

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