RFR: 8374782: Parallel: Remove specialized objArray iteration code

[Ivan Walulya]

On Wed, 4 Feb 2026 08:40:07 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Hi,
>> 
>> Please review this change removes specialized local methods used to iterate over array slices in `PSPromotionManager`. Any performance differences between these methods and `objArrayOopDesc::oop_iterate_elements_range` are attributable to differences in inlining behavior. For this reason, `ALWAYSINLINE` is applied. Further investigation is ongoing to improve inlining of calls through `objArrayOopDesc::oop_iterate_elements_range`.
>> 
>> Testing: Tier 1-3, perf testing with SPECjvm2008-XML.validation.
>
> I suggest renaming the title now that the investigation is complete; maybe just `Parallel: Remove specialized ...`.

Thanks @albertnetymk and @tschatzl for the reviews!

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PR Comment: https://git.openjdk.org/jdk/pull/29486#issuecomment-3846410781