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From "pradip sonar (JIRA)" <xalan-...@xml.apache.org>
Subject [jira] Created: (XALANJ-2502) Some serious performance issues with XPathAPI processing
Date Tue, 01 Sep 2009 10:51:33 GMT
Some serious performance issues with XPathAPI processing

                 Key: XALANJ-2502
                 URL: https://issues.apache.org/jira/browse/XALANJ-2502
             Project: XalanJ2
          Issue Type: Bug
      Security Level: No security risk; visible to anyone (Ordinary problems in Xalan projects.
 Anybody can view the issue.)
          Components: XPath-API
    Affects Versions: 2.2.x
         Environment: Win Xp, Java 5, xalan-2.7.1, xerces-2.9.0
            Reporter: pradip sonar
            Priority: Critical

I am facing some serious performance issues with XPathAPI processing using 
the latest releases of Xalan (xalan-2.7.1). I am using Xerses release xerces-2.9.0.

I tried a very simple test case which attempts using a DOM document 
which consists of about 1000 sibling elements directly beneath the document 
root node.

I query this file by getting a 1000 element NodeList from the root 
using XPathAPI.selectNodeList() and subsequently querying each of the 1000 
nodes with 4 calls to XPathAPI.selectSingleNode() in order to get the 
attribute and node values.

Using the first releases of Xalan 1.x, this was 
accomplished in under very few seconds. Using the current releases, noted above, 
this takes up to few minutes!.

Does anyone know anything about this, are others having these probems?

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