RFR: 8348880: Replace ConcurrentMap with AtomicReferenceArray for ZoneOffset.MINUTES_15_CACHE [v5]

[Chen Liang]

On Tue, 28 Jan 2025 17:06:24 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:
> 
>   from @liach

Looks good to me. No related failures in tier 1-3 tests. Please wait for another java.time reviewer too.

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Marked as reviewed by liach (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/23337#pullrequestreview-2579640891