RFR: 8037914: Add JFR event for string deduplication [v7]

[Francesco Andreuzzi]

On Mon, 17 Nov 2025 14:27:24 GMT, Erik Gahlin <egahlin at openjdk.org> wrote:

>> Francesco Andreuzzi has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 15 additional commits since the last revision:
>> 
>>  - remove elapsed. remove idle
>>  - Merge branch 'master' into JDK-8037914
>>  - rename. start/end time
>>  - no start
>>  - enable
>>  - bytes to size
>>  - disable
>>  - revert
>>  - one event
>>  - trailing
>>  - ... and 5 more: https://git.openjdk.org/jdk/compare/c7ce9f21...fc47a64e
>
> From a JFR perspective, this looks good. Ideally, the values of the event should be sanity-checked, but I understand this might be tricky to do in a reliable manner. Hunting down false positives would just be a waste of time. The copyright year of the test should be 2025.
> 
> It would be good if someone on the GC team could take a look at the GC-related code.

Thanks for the review @egahlin and @albertnetymk.

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PR Comment: https://git.openjdk.org/jdk/pull/28015#issuecomment-3546398933