RFR: 8274112: (fc) Tune FileChannel.transferTo() [v6]

[Brian Burkhalter]

On Fri, 29 Apr 2022 16:37:06 GMT, Lance Andersen <lancea at openjdk.org> wrote:

>> Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   8274112: Revert all changes except mapped transfer threshold
>
> test/jdk/java/nio/channels/FileChannel/TransferToChannel.java line 52:
> 
>> 50:     private static final Random RAND = RandomFactory.getRandom();
>> 51: 
>> 52:     private static final int FILE_SIZE = 1000*1024;
> 
> Could use a comment regarding the reason the file size is what it is

I don't recall why that particular value was chosen except in relation to other constants. Will add some comments.

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PR: https://git.openjdk.java.net/jdk/pull/5623