RFR: 8348880: Replace ConcurrentMap with AtomicReferenceArray for ZoneOffset.QUARTER_CACHE [v9]

[Chen Liang]

On Wed, 29 Jan 2025 15:17:21 GMT, Shaojin Wen <swen at openjdk.org> wrote:

>> ZoneOffset.MINUTES_15_CACHE uses AtomicReferenceArray to replace ConcurrentMap to avoid object allocation caused by boxing from int to Integer during access.
>
> Shaojin Wen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   copyright

Marked as reviewed by liach (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/23337#pullrequestreview-2581405788