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https://issues.apache.org/jira/browse/XERCESJ-1449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Simmons updated XERCESJ-1449:
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Attachment: XercesUnionPerformance.zip
This is a simple performance harness (eclipse project zip). Typical output of
the main method's second pass is as follows:-
string took 146
dateTime took 242
dateOrDateTime took 1013
dateTimeOrDate took 321
The names refer to schema types or unions. Note that dateOrDateTime is about
3* slower.
> Validation of schema type unions are relatively slow due to use of exceptions.
> ------------------------------------------------------------------------------
>
> Key: XERCESJ-1449
> URL: https://issues.apache.org/jira/browse/XERCESJ-1449
> Project: Xerces2-J
> Issue Type: Improvement
> Components: XML Schema 1.0 Datatypes
> Reporter: Chris Simmons
> Attachments: XercesUnionPerformance.zip
>
>
> I'll shortly attach some example code which shows that validating
> 2010-01-01T00:00:00.000Z
> against the union (date, dateTime) is slower by a factor of three than
> validating against (dateTime, date).
> This appears to be because if validation fails against the first member of
> the union then an exception is thrown.
> It would therefor be quicker to change the simple type validation to allow an
> error handler of some sort to be passed in so that union types will not have
> to use exception handling when validating.
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