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https://issues.apache.org/jira/browse/XERCESJ-1705?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16745166#comment-16745166
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Gerben Abbink commented on XERCESJ-1705:
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Thank you for your feedback.
But, i do think there's a problem somewhere. So, i created new and better test
files. The old PROBLEM.xml and PROBLEM.xsd are no longer needed.
Here are the new test files:
NEW_PROBLEM.xml
NEW_PROBLEM.xsd.
I have also included two Java demos that validate the XML against the XSD 1.1:
SaxonEETester.java <== you need a (temporary) Saxon-EE license key to run this.
XercesTester.java
I run these demos on a 64-bits Windows 10 machine with 8GByte and paging files.
I compile and run both Java programs with 64-bits Java 11 (OpenJDK) from the
Windows Command Prompt.
In my previous post i mentioned XMLSpy , but here i am testing against the
Saxon-EE XSD 1.1 validator from Saxonica because it's also a Java
implementation, so i expect more or less similar results.
Here are the results:
The Saxon validator needs 9 sec. to come up with the right answer.
The Xerces validator crashes after 5 minutes with an error message.
I have included both outputs. According to Xerces's output there is not enough
memory to continue.
My conclusion: this is not a performance problem but it is a memory problem. I
am curious if you can replicate the results under similar circumstances.
> Validation against asserts (1.1) is slow and takes up a lot of memory for
> larger files.
> ---------------------------------------------------------------------------------------
>
> Key: XERCESJ-1705
> URL: https://issues.apache.org/jira/browse/XERCESJ-1705
> Project: Xerces2-J
> Issue Type: Bug
> Components: XML Schema 1.1 Structures
> Affects Versions: 2.12.0
> Reporter: Gerben Abbink
> Priority: Major
> Attachments: NEW_PROBLEM.xml, NEW_PROBLEM.xsd, PROBLEM.xml,
> PROBLEM.xsd, SaxonEETester.java, SaxonOutput.txt, XercesOutput.txt,
> XercesTester.java
>
>
> The validation of xml against asserts in XMLSchema 1.1 is slow and takes up a
> lot of memory for larger xml files. I have created a simple test xml file
> with lots of repetition and a corresponding xml schema to show the problem.
> It takes 20 sec. to validate the xml against the xml schema. When i remove
> the asserts in the xml schema it takes just 1 second to validate. Testing was
> done from the command prompt on a modern Windows machine with 8GByte memory.
> To compare, i have also validated the xml file against the xml schema in
> XMLSpy. With asserts it takes 2 sec., without the asserts 1 sec. (XMLSpy does
> not uses Xerces.)
>
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