RFR: 8300236: Use VarHandle access in Data(Input | Output)Stream classes [v2]

[Per Minborg]

On Fri, 20 Jan 2023 18:21:59 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Improve doc and fix typo
>
> src/java.base/share/classes/jdk/internal/util/access/ByteArrayAccess.java line 614:
> 
>> 612:     /*
>> 613:      * Methods for packing primitive values into byte arrays starting at offset zero.
>> 614:      */
> 
> Is the only advantage to the zero offset versions in the API, shorter invocations with fewer parameters? 
> Is there any performance difference?

Very good question. I will take a look at it. A fixed value is inserted in the original var handle so potentially it might improve performance that way too.

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PR: https://git.openjdk.org/jdk/pull/12076