RFR: 8299234: JMX Repository.query performance [v3]

[Alexey Bakhtin]

On Wed, 11 Jan 2023 14:09:21 GMT, Alexey Bakhtin <abakhtin at openjdk.org> wrote:

>> Please find a patch to improve JMX Repository.query performance
>> 
>> Using ObjectName.apply() allows significantly decrease memory usage and the number of GC cycles:
>> Before:
>> 
>> $ java test 1000000 1000000
>> Test PASSED in 8943169791 ns.
>> GC: G1 Young Generation getCollectionCount()=177 getCollectionTime()=118
>> 
>> 
>> After:
>> 
>> $ java test 1000000 1000000
>> Test PASSED in 4808213917 ns.
>> GC: G1 Young Generation getCollectionCount()=88 getCollectionTime()=53
>> 
>> Private ObjectName.matchDomains() method is also updated to minimize unnecessary memory allocation.
>> 
>> All javax/management jtreg tests passed successfully.
>
> Alexey Bakhtin has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix parameters order for Util.wildmatch

Hi Daniel, Yes, I'd like to backport these changes to JDK11 and 8. Such changes to the OjectName could be unacceptable risky. I have reverted all changes in the ObjectName class.

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PR: https://git.openjdk.org/jdk/pull/11758