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Posted to j-dev@xerces.apache.org by "Michael Glavassevich (Updated) (JIRA)" <xe...@xml.apache.org> on 2012/03/11 17:57:58 UTC
[jira] [Updated] (XERCESJ-1227) Poor performance / OutOfMemoryError
for sequences, choices and nested with large minOccurs/maxOccurs
[ https://issues.apache.org/jira/browse/XERCESJ-1227?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael Glavassevich updated XERCESJ-1227:
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Labels: gsoc gsoc2012 mentor (was: )
> Poor performance / OutOfMemoryError for sequences, choices and nested with large minOccurs/maxOccurs
> ----------------------------------------------------------------------------------------------------
>
> Key: XERCESJ-1227
> URL: https://issues.apache.org/jira/browse/XERCESJ-1227
> Project: Xerces2-J
> Issue Type: Bug
> Components: XML Schema 1.0 Structures
> Affects Versions: 2.9.0
> Reporter: Michael Glavassevich
> Priority: Minor
> Labels: gsoc, gsoc2012, mentor
>
> We now handle large minOccurs/maxOccurs on element/wildcard particles more gracefully by creating a compact representation in the DFA and using counters to check the occurence constraints, however we will still fully expand the content model for minOccurs/maxOccurs on sequences and choices which could still lead to an OutOfMemoryError or very poor performance (i.e. could still take several minutes to build the DFA). Sequences, choices and nested minOccurs/maxOccurs are somewhat tricker to handle. We would need a more general solution than the one implemented for elements and wildcards to improve those.
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