Re: [xslt] Dramatically increase of memory operations after upgrade

[Daniel Veillard <veillard redhat com>]

On Thu, Oct 06, 2005 at 07:40:36PM +0400, Vladimir Grebenschikov wrote:
> Hi
> 
> While upgrade of my product with libxml2 and libxslt
> 
> OLD               NEW
> libxslt-1.1.11 -> libxslt-1.1.15
> libxml2-2.6.14 -> libxml2-2.6.22
> 
> After upgrade of XML/XSLT libraries I have notice big slowdown of
> parsing XSL documents, trying to resolve issue I've figured out that
> problem is due to dramatically increase of number of allocation and
> de-allocation during same XSL style-sheet parsing:
> 
> test.xsl:
> OLD: document test.xsl loading statistics: allocations 33528, de-allocations 14250
> NEW: document test.xsl loading statistics: allocations 72089, de-allocations 54475
> 
> screen.xsl:
> OLD: document screen.xsl loading statistics: allocations 93158, de-allocations 36145
> NEW: document screen.xsl loading statistics: allocations 211636, de-allocations 160267
> 
> Both documents relatively big with number of includes.
> Also I have notice that difference between allocations and de-allocation almost not changed.
> 
> ~ x 2 times increase for allocations
> ~ x 4 times increase for de-allocations
> ~ x 3 times increase in total
> 
> It is not clean for me:
> - what causes such big increase of number memory allocation operation ?
> - why increase of allocations do not consistent with increase of de-allocations ?
> - is it desired or it is bug ?
> 
> In contrary allocations/de-allocations for loading plain XML documents has a bit lower numbers on new libraries.
> 
> Any clues/ideas about it ? 

  Not really, I would expect a decrease actually ... strange

Daniel

-- 
Daniel Veillard      | Red Hat Desktop team http://redhat.com/
veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
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