RFR: 8308899: Introduce Classfile.Context and improve Classfile.Option(s) [v11]

[Adam Sotona]

On Thu, 8 Jun 2023 16:37:22 GMT, Adam Sotona <asotona at openjdk.org> wrote:

>> Classfile context object and multi-state options have been discussed at https://mail.openjdk.org/pipermail/classfile-api-dev/2023-May/000321.html
>> This patch implements the proposed changes in Classfile API and fixes all affected code across JDK sources and tests.
>> 
>> Please review.
>> 
>> Thanks,
>> Adam
>
> Adam Sotona has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - proposed semi-synchronized caching, where the map is not locked during delegate call
>  - used Factory.INSTANCE for system ClassHierarchyResolver cache

I'll run our standard benchmarks to compare following scenarios:
- static synchronized single instance cache (current master)
- context-based non-synchronized caches  `HM::computeIfAbsent`
- context-based fully synchronized caches `CHM::computeIfAbsent`
- context-based thread-safe lazy synchronized caches `CHM::get ... compute ... CHM::put`

And let's see the performance impact.

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PR Comment: https://git.openjdk.org/jdk/pull/14180#issuecomment-1584050539