RFR: 8345405: Add JMH showing the regression in 8341649

[Coleen Phillimore]

On Wed, 4 Dec 2024 18:55:23 GMT, Eric Caspole <ecaspole at openjdk.org> wrote:

> This JMH using MethodHandles shows the regression in 8341649, for example comparing 24-b25, which included the regression to today's head. It was an interaction between the runtime and C2 rather than a change in MethodHandles.
> 
> Here are example results from an Ampere platform:
> jdk-24-b25 before the fix:
> Benchmark                (classes)  (instances)   Mode  Cnt   Score   Error   Units
> MethodHandleStress.work       1000          100  thrpt   20  33.423 ± 7.678  ops/ms
> 
> Today's head with the fix:
> Benchmark                (classes)  (instances)   Mode  Cnt    Score    Error   Units
> MethodHandleStress.work       1000          100  thrpt   20  709.249 ± 50.575  ops/ms

Thank you for adding this test. Looks good to me.

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Marked as reviewed by coleenp (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/22556#pullrequestreview-2482518334