Saxon

Legacy ID: #3719571 Legacy Poster: Don Burden (donburden)

I've been trying to benchmark, translating a .NET XMLDocument with both the .NET 1.1 Transform method and the Saxon XsltTransformer. Using the cs samples as a guide, this line where InitialContextNode is set seems to take a huge amount of time compared to the actual translation: xslTrans.InitialContextNode=xslProc.NewDocumentBuilder().Build(xmlDoc); Am I doing this right, or is there a faster way to do this? Here is some code that simulates something I need to do. I'm declaring the translations globally, then loading XML documents in sequence, then applying the same translation to each. Benchmarking .NET 1.1: Defining globally: xmlDoc=new XmlDocument(); XslTransform xsl=new XslTransform(); xsl.Load("Trans.xsl"); //this is about a 20K XSL file, compatible with XSLT 2.0, no jscript or other extensions sXml=..... //this is about a 10K XML string. //.NET 1.1 benchmark routine: XmlReader xmlr; for (int i=1; i<=5000; i++){ xmlDoc.LoadXml(sXml); //make believe each XML string is a unique XML document xmlr=xsl.Transform(xmlDoc.CreateNavigator(), null); xmlDoc.Load(xmlr); } Above takes 8 seconds. Throughput is 613 XML documents per second. Benchmarking Saxon: Defining globally: xmlDoc=new XmlDocument(); xslProc = new Processor(); xslTrans = xslProc.NewXsltCompiler().Compile(new Uri("...Trans.xsl")).Load(); //("..." is really full path to above xsl file) //Saxon benchmark routine: for (int i=1; i<=5000; i++){ xmlDoc.LoadXml(sXml); //make believe each XML string is a unique XML document DomDestination result = new DomDestination(); xslTrans.InitialContextNode=xslProc.NewDocumentBuilder().Build(xmlDoc); xslTrans.Run(result); xmlDoc=result.XmlDocument; } This takes 22 seconds. Throughput is only 227 XML documents per second. InitialContextNode was detected as the problem by taking that line and moving it outside (above) the loop. Benchmark then runs without error, and the results are more in line with the .NET version, loop takes 7 seconds, and throughput goes up to 673 XML documents per second. Does the .Build method really need to be called for each new XMLDocument loaded, or is there a faster and more efficient way to set InitialContextNode?