JDK 9 RFR: 8176168: Performance drop due to SAXParser SymbolTable reset

[Lance Andersen]

Hi Aleksei,

I think the change makes sense and pending CCC approval should be good to go :-)

Best
Lance
> On Apr 16, 2017, at 6:02 PM, Aleks Efimov <aleksej.efimov at oracle.com> wrote:
> 
> Hi,
> 
> Please, help to review the fix [1] for a performance regression in SPECjvm2008-XML benchmark. The cause of this regression was the unconditional reset of SAX parsers symbol table during each reset() operation introduced by JDK-8173390.
> Proposed fix introduces new system property (CCC request is still pending approval) that provides ability to control the symbol table reset functionality. By default the reset table functionality is disabled, similar to pre JDK-8173390 behavior. JAXWS parsers pool implementation was updated to utilize new property to reset symbol table only in JAXWS use-cases that helped to restore the performance levels to pre JDK-8173390 level.
> 
> Modified regression test and XML related JCK tests passes on build with proposed changes.
> 
> With Best Regards,
> Aleksei
> 
> [1] http://cr.openjdk.java.net/~aefimov/8176168/00/

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