RFR: 8352075: Perf regression accessing fields [v15]

[Radim Vansa]

On Sat, 31 May 2025 14:49:48 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Radim Vansa has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   More debug logs
>
> I can reproduce the crash when building slowdebug on linux-x64.

@coleenp I fixed the coding style (I wish OpenJDK had a linter, or at least a checker... the asterisk placement is hard to get used to), improved docs and moved the jtreg test to runtime/FieldStream (I think that FieldLayout checks how are fields placed within an instance).

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PR Comment: https://git.openjdk.org/jdk/pull/24847#issuecomment-2933845743