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https://issues.apache.org/jira/browse/XERCESJ-1227?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17423522#comment-17423522
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Anderson Vaz commented on XERCESJ-1227:
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I'm using Xerces 2.12.1 and I have a `maxOccurs=5000` which seems to be the
limit and the parsing increases a few orders of magnitude, like a suite of 18
tests that when `maxOccurs=unbounded` takes 30 seconds with `maxOccurs=5000`
takes 3 minutes.
Is there any workaround?
I would like to help if someone provide a bit of guidance where should I look.
> 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, XML Schema 1.1 Structures
> Affects Versions: 2.9.0
> Reporter: Michael Glavassevich
> Priority: Minor
> Labels: gsoc, gsoc2014, 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.
> With the introduction of XML Schema 1.1 support we would also need to
> consider how to improve this for the enhanced xs:all model groups.
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