Hi Xalan Developers, when using the javax.xml.xpath API there seems to be a big performance hit compared to using the org.apache.xpath API.
When evaluating a compiled XPath expression multiple times on different context nodes as specified in Xpath Filtering http://www.w3.org/TR/xmldsig-core/#sec-XPath it seems to take about 30 times longer. > e.g.: > private XPathExpression compiledXPathExpr_; > ... > return ((Boolean) compiledXPathExpr_.evaluate(contextNode, > XPathConstants.BOOLEAN)).booleanValue(); As a potential source for the performance hit we identified the Method "private XObject eval ( Object contextItem )" in "org.apache.xpath.jaxp.XPathExpressionImpl.eval()" . It performs much worse compared to the following code ... > e.g.: > private XPath xpath_; > ... > XObject xobject = xpath_.execute(context_, contextNode, > prefixResolver_); > boolean result = xobject.bool(); > return result; We beleieve the time is lost on XPathContext creation. Thanks in advance and best regards Konrad Lanz -- Konrad Lanz, IAIK/SIC - Graz University of Technology Inffeldgasse 16a, 8010 Graz, Austria Tel: +43 316 873 5547 Fax: +43 316 873 5520 http://www.iaik.tugraz.at/content/about_iaik/people/lanz_konrad/ http://jce.iaik.tugraz.at/sic/products/xml_security/ Downlaod certificate chain (including the EuroPKI root certificate): http://ca.iaik.tugraz.at/capso/certs.jsp
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