RFR: 8352075: Perf regression accessing fields [v8]

[Radim Vansa]

On Sat, 24 May 2025 20:09:02 GMT, John R Rose <jrose at openjdk.org> wrote:

>> Radim Vansa has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Add search table validation
>
> That said, I'm looking at your validation logic to see if a gtest can be deferred until the logic is fully factored. A stress mode test would do it for now.

@rose00 OK, so I have refactored out the `PackedTable` that now hosts the logic for packing two `uint32_t` values with arbitrary number of bits into a record, and binary search using custom comparator. Haven't added any gtests to test the functionality independently, though.

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PR Comment: https://git.openjdk.org/jdk/pull/24847#issuecomment-2914182870