Backporting the FileChannel.transferTo (Windows) improvement to JDK 8

[Martin Sawicki (MS OPEN TECH)]

Hello,

We'd like to propose to backport our FileChannel.transferTo() performance improvement for Windows that was recently accepted into JDK9 to JDK8:

(JDK9 fix for reference: http://hg.openjdk.java.net/jdk9/dev/jdk/rev/ba6d8f56003b)



Our suggested webrev patch is attached.

Your review and acceptance of this contribution would be appreciated.



Best regards,

Martin Sawicki (and Kirk Shoop, and Valeriy Kopylov) Microsoft Open Technologies, Inc.

A subsidiary of Microsoft Corp.