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https://issues.apache.org/jira/browse/XERCESJ-1406?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Glavassevich resolved XERCESJ-1406.
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Resolution: Fixed
Fix Version/s: 2.10.0
Implemented in SVN rev 883581.
> Performance: XMLSchemaValidator.findSchemaGrammar() called too often.
> ---------------------------------------------------------------------
>
> Key: XERCESJ-1406
> URL: https://issues.apache.org/jira/browse/XERCESJ-1406
> Project: Xerces2-J
> Issue Type: Improvement
> Components: XML Schema 1.0 Structures
> Affects Versions: 2.9.1
> Reporter: Michael Glavassevich
> Assignee: Michael Glavassevich
> Fix For: 2.10.0
>
>
> On every startElement() call we attempt to look-up a SchemaGrammar which is
> usually never read. In the best case it's already in the XMLGrammarPool, but
> when we're processing local elements with no namespace we're likely to end up
> calling the EntityResolver over and over again (even when none is registered
> we always go through XMLEntityManager.resolveEntity()), attempting to load an
> empty XMLInputSource with the schema loader and after all that returning null
> back from the method. That's a lot of wasted time.
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