RFR: 8299234: JMX Repository.query performance

[Kevin Walls]

On Wed, 21 Dec 2022 18:50:52 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.

Hi,
Speedup sounds good.
So we don't need the ObjectNamePattern class, and it's private so no dependencies.
I haven't fully followed the wildcard matching changes yet.
Will try and do some testing also.

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