Cart
[Home] [By Thread] [By Date] [Recent Entries]
FYI... The source of enlightenment as to the proper way of pressure cooking a processor came straight from MK himself so it definitely has good foundation obviously (and proper credit should be given to him for helping me further understand how to properly build a test sequence for a processor) On Mon, 28 Mar 2005 02:23:47 -0800 (PST), Mukul Gandhi <mukul_gandhi@y...> wrote: > Hi M. David, > The execution time I reported is not for a single > transformation run. It is average of 5 runs. Every > single run varies slightly (by few milliseconds; > sometimes it is same).. So average needs to be taken. > > I agree that my method will not say truly about the > performance characteristic of the processors. We need > to measure time over a wide range and size of > transforms.. > > I'll surely read the details on your site. > > Regards, > Mukul > > --- "M. David Peterson" <m.david.x2x2x@g...> > wrote: > > > Hey Mukul, > > > > As I have learned from creating similar tests and > > posting the results > > there are too many outside factors that go into > > these one off > > measurements to put any sort of weight on the > > result. If interested, > > after I discovered the details of how to properly > > pressure cook a > > processor I created a quick little test suite that > > takes any given > > piece of XML, creates a range of file sizes > > (dynamically specified in > > the config file) and combines this with a structured > > series of > > commandline sequences to properly put a processor to > > the test in sets > > of 1, 3, and 9 iterations through the same XML > > file, outputting the > > results into seperate files that can then be used to > > develop a much > > more qualified understanding of what your dealing > > with... > > > > I actually have several iterations of this original > > test-suite (it was > > a quick hack... its "grown-up" quite a bit since and > > I plan to release > > the new and improved version around the same time > > Saxon.NET goes from > > RC1 > RC2 > 1.0 Final in the next week or so) but > > for now if you want > > to play around with it you can access the file and a > > quick explanation > > of how it worls here > > > > http://www.xsltblog.com/archives/2004/12/next_portion_of.html > > > > Have fun :D > > > > <M:D/> > > > > > > On Mon, 28 Mar 2005 01:25:35 -0800 (PST), Mukul > > Gandhi > > <mukul_gandhi@y...> wrote: > > > I did a small performance comparison between > > Xalan-J > > > 2.6.0 and Saxon 8.3 . I ran a simple identity > > > transform on a small XML file. > > > > > > The XSLT is - > > > > > > <?xml version="1.0"?> > > > <xsl:stylesheet > > > xmlns:xsl="http://www.w3.org/1999/XSL/Transform" > > > version="1.0"> > > > > > > <xsl:output method="xml" indent="yes" /> > > > > > > <xsl:template match="@* | node()"> > > > <xsl:copy> > > > <xsl:apply-templates select="@* | node()" /> > > > </xsl:copy> > > > </xsl:template> > > > > > > </xsl:stylesheet> > > > > > > Average execution time recorded were: > > > ------------------------------------- > > > Xalan-J 2.6.0 : > > > with -DIAG option 220 ms > > > > > > Saxon 8.3 : > > > with -TP option 47 ms(Saxon's performance analysis > > > tool) > > > with -t option 63 ms > > > > > > It seems Saxon is faster than Xalan. It seems upto > > > about 4-5 times.. I am assuming both Xalan and > > Saxon > > > are measuring the same things! > > > > > > If "GNU JAXP XSLT processor" is 2.8 times faster > > than > > > Xalan , then Saxon is approximately 2 times faster > > > than GNU XSLT processor .. > > > > > > I read in an article by Michael Kay that Saxon > > uses an > > > efficient tree structure suited for XPath data > > model.. > > > DOM and XPath tree models don't map 100%. But I am > > not > > > sure what Xalan uses.. I guess it is DOM or a > > slight > > > variant of it.. > > > > > > Regards, > > > Mukul > > > > > > --- Chris Burdess <dog@b...> wrote: > > > > Michael Kay wrote: > > > > >> What kind of parser is best to use for XSLT > > > > transformations ? > > > > >> SAX or DOM > > > > > > > > > > XSLT processors will in general build a tree > > > > representation of the > > > > > source > > > > > document in memory. And in general, many of > > them > > > > will build a tree > > > > > representation that is much more efficient > > than > > > > using a > > > > > general-purpose DOM. > > > > > So there's no point building an inefficient > > DOM > > > > tree rather than > > > > > letting the > > > > > XSLT processor build its own. But this advice > > may > > > > depend on the XSLT > > > > > processor you are using. > > > > > > > > For what it's worth, the GNU JAXP XSLT processor > > > > uses DOM internally > > > > for both source and result trees, and is about > > 2.8 > > > > times as fast as > > > > Xalan on a wide range of transformations (the > > OASIS > > > > XSLT/XPath > > > > conformance suite). I don't have figures for > > memory > > > > usage or > > > > comparisons with Saxon though. > > > > -- > > > > Chris Burdess > > > > > > > > > > > > > > > > > > ----------------------------------------------------------------- > > > > The xml-dev list is sponsored by XML.org > > > > <http://www.xml.org>, an > > > > initiative of OASIS <http://www.oasis-open.org> > > > > > > > > The list archives are at > > > > http://lists.xml.org/archives/xml-dev/ > > > > > > > > To subscribe or unsubscribe from this list use > > the > > > > subscription > > > > manager: > > > > <http://www.oasis-open.org/mlmanage/index.php> > > > > > > > > > > > > > > __________________________________ > > > Do you Yahoo!? > > > Yahoo! Mail - now with 250MB free storage. Learn > > more. > > > http://info.mail.yahoo.com/mail_250 > > > > > > > > > ----------------------------------------------------------------- > > > The xml-dev list is sponsored by XML.org > > <http://www.xml.org>, an > > > initiative of OASIS <http://www.oasis-open.org> > > > > > > The list archives are at > > http://lists.xml.org/archives/xml-dev/ > > > > > > To subscribe or unsubscribe from this list use the > > subscription > > > manager: > > <http://www.oasis-open.org/mlmanage/index.php> > > > > > > > > > > > > -- > > <M:D/> > > > > :: M. David Peterson :: > > XML & XML Transformations, C#, .NET, and Functional > > Languages Specialist > > > > __________________________________ > Do you Yahoo!? > Yahoo! Small Business - Try our new resources site! > http://smallbusiness.yahoo.com/resources/ > -- <M:D/> :: M. David Peterson :: XML & XML Transformations, C#, .NET, and Functional Languages Specialist
|
