RFR: 8309976: Add microbenchmark for stressing code cache [v3]

[Eric Caspole]

On Fri, 16 Jun 2023 17:28:16 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Eric Caspole has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Fix copyright header and apply Alekseys comments
>
> I think the benchmark code needs massaging for style and other issues.
> See e.g. the cursory review:

@shipilev - ping, Aleksey is this version OK with you? 
Thanks, 
Eric

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PR Comment: https://git.openjdk.org/jdk/pull/14521#issuecomment-1611593885