RE: [xml] libXml speed and memory use (v Xerces)

[Jesse Pelton <jsp PKC com>]

Benchmarking is a notoriously difficult thing to do well; so much depends on
the particulars.  Your benchmark may be a better or worse reflection of your
actual use case(s) than the one on SourceForge.

Bear in mind that the benchmark is a bit dated.  It compares Xerces 2.1 and
libxml2 2.4.30; current versions are 2.3 and 2.5.8 respectively.  The Xerces
crew has done a fair amount of performance tuning since 2.1, especially in
2.2.

> -----Original Message-----
> From: Vincent Finn [mailto:vincent finn automsoft com] 
> Sent: Friday, July 18, 2003 12:49 PM
> To: 'xml gnome org'
> Subject: [xml] libXml speed and memory use (v Xerces)
>
>
> Hi,
>
> On the web page for libXml there are time comparisons given 
> between it and
> xerces
> and lib comes out ahead
>
> I am comparing it to xerces (not in a very sophisticated way) 
> and getting
> very different results
>
> I'll put my code and results at the bottom but basically xerces uses
> substantially less memory
> and is noticeably quicker
>
> Are there any optimisations in building of libXml2.dll that 
> can be switched
> on and off for performance?
>
> since I might have expected one or the other to be worse but 
> not both !!
>       
>       Vin
>
> Here is the code I used
>
> libXml
> ------
>       int iStartTime = time(NULL);
>       int const c_iIterations = (int)1e4;
>       for (int i = 0; i < c_iIterations; ++i)
>       {
>               xmlDocPtr test = xmlParseFile(strFileName.c_str());
>               xmlFreeDoc(test);
>       }
>       int iEndTime = time(NULL) - iStartTime;
>
> results 
>       Memory use 2,154,496 bytes
>       time taken 120 seconds
>
> --------------------------------------------------
>
> xerces
> ------
>       XMLPlatformUtils::Initialize();
>       int iStartTime = time(NULL);
>       int const c_iIterations = (int)1e4;
>       for (int i = 0; i < c_iIterations; ++i)
>       {
>               XercesDOMParser test;
>               test.parse(strFileName.c_str());
>               DOMDocument* doc = test.getDocument();
>       }
>       int iEndTime = time(NULL) - iStartTime;
>       XMLPlatformUtils::Terminate();
> results
>       Memory use 1,851,393 bytes
>       time taken 95 seconds
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