RFR: 8284638: store skip buffers in InputStream Object [v6]

[liach]

On Thu, 14 Apr 2022 18:52:25 GMT, XenoAmess <duke at openjdk.java.net> wrote:

>> @jmehrens what about this then?
>> I think it safe now(actually this mechanism is learned from Reader)
>
> XenoAmess has updated the pull request incrementally with one additional commit since the last revision:
> 
>   refine jmh

Now this makes sense, that with a skip buffer of 2048, skipping by 2048 has a similar performance as skipping by 8192 for field-backed ones.

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PR: https://git.openjdk.java.net/jdk/pull/5872