RFR: 8365040: G1: Remove sorting at end of collection set selection

[Albert Mingkun Yang]

On Thu, 7 Aug 2025 12:10:49 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

> Hi all,
> 
>   please review this change to remove some unnecessary sorting of the collection set introduced in https://bugs.openjdk.org/browse/JDK-8165313, and made unnecessary in https://bugs.openjdk.org/browse/JDK-8165443 (all JDK 9 :)).
> 
> Testing: test case in CRs, see CR for test results, gha
> 
> Thanks,
>   Thomas

Doesn't `_cleanup_list.add_ordered(&local_cleanup_list);` in `G1UpdateRegionLivenessAndSelectForRebuildTask` require those regions to be sorted?

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PR Comment: https://git.openjdk.org/jdk/pull/26676#issuecomment-3196255028