Dear Jeremias, If any person are interested in make the same test , i'll send him the two files (xml and xsl).
Perhaps I have something wrong in other part or library !? Thanks -----Mensaje original----- De: Jeremias Maerki [mailto:[EMAIL PROTECTED] Enviado el: viernes, 23 de septiembre de 2005 17:23 Para: [email protected] Asunto: Re: FOP improvement up to 3000%. I share Jay's view here. It's unclear under which conditions the measurements were taken. I think it's difficult to tell which one is faster. I've found benchmarks on the net which make Xerces the winner: http://piccolo.sourceforge.net/bench.html http://www.devsphere.com/xml/benchmark/summary.html#xml_parsers_xerces_versus_crimson But there is also one by Sun which shows the opposite but never in the area of factor 30. Since in the FOP use case only SAX parsing is important, it could very well be that Crimson is faster. Validation may influence the performance, too. Difficult to say. Does anyone want to do a FOP benchmark with different combinations of XML parser and XSLT processor and put that on the FOP Wiki? There are lots of little aspects that influence the overall performance. I think that would be cool. On 23.09.2005 16:55:43 JBryant wrote: > Were the conditions of the two runs exactly the same? For example, if > you were timing the first run of the Xerces parser and the second run > of the Crimson parser, caching could account for much of the difference. > > Also, such items as configuration differences can have a large impact. > If you were using the default amount of memory, perhaps Xerces would > benefit from a change in that setting while Crimson may be more > efficient in its use of memory and not suffer from using the default. > Thus, changing configuration could account for at least some of the > difference. Your mention that "This library give very poor performance > where xml file is large" makes me think memory may be part of the difference. > > I'm sure other issues could factor into it as well. > > Of course, Crimson may simply be a much faster parser. I have heard > good things about Crimson from a number of quarters. > > Jay Bryant > Bryant Communication Services > (presently consulting at Synergistic Solution Technologies) > > > > > > "Xaus, Jaume" <[EMAIL PROTECTED]> > 09/23/2005 05:50 AM > Please respond to > [email protected] > > > To > <[email protected]> > cc > > Subject > FOP improvement up to 3000%. > > > > > > > > > > > > > Dear friends, > > We are using FOP api in order to build PDF documents from large Xml files. > > The FOP package distribution contains Xerces as xml parser. ([Debug] > Using org.apache.xerces.parsers.SAXParser as SAX2 Parser) > > This library give very poor performance where xml file is large. > > We improved up to 3000% the performance simplement changin Xerces for > Crimson library.([Debug] Using org.apache.crimson.parser.XMLReaderImpl > as > SAX2 Parser) > > Does anyone know the reason off this performance difference ? > Thanks > > > > > Jaume Xaus > Director Departament Java > [EMAIL PROTECTED] > > > “La confianza, como el arte, nunca proviene de tener todas las > respuestas, sino de estar abierto a todas la preguntas.†Earl Gray > Stevens. > > > > > > > > -- > No virus found in this outgoing message. > Checked by AVG Anti-Virus. > Version: 7.0.344 / Virus Database: 267.11.5/110 - Release Date: > 22/09/2005 Jeremias Maerki --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.5/110 - Release Date: 22/09/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.5/110 - Release Date: 22/09/2005
