RFR: 8278268 - (ch) InputStream returned by Channels.newInputStream should have fast path for FileChannel targets [v16]

[Markus KARG]

On Sat, 25 Dec 2021 16:10:37 GMT, Markus KARG <duke at openjdk.java.net> wrote:

>> This sub-issue defines the work to be done to implement JDK-8265891 solely for the particular case of FileChannel.transferFrom(ReadableByteChannel), including special treatment of SelectableByteChannel.
>
> Markus KARG has updated the pull request incrementally with three additional commits since the last revision:
> 
>  - separate test class for each large file test
>  - Base class only contains utilities and helpers
>  - Renamed AbstractTransferTo to TransferToBase as it is not abstract

Please keep this PR open; I will continune work on it soon.

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PR: https://git.openjdk.org/jdk/pull/6711