Backporting the FileChannel.transferTo (Windows) improvement to OpenJDK v7

[Seán Coffey]

Martin,

This patch should apply easily enough to the jdk7u-dev codebase. Some 
minor edits may be necessary.
I'll work off the jdk8u changeset : 
http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/c5d9397d4d41

The new system property was approved for use with 8u and later only. 
I'll work with Alan to ensure
that we get CCC approval to get this fixed in 7u-dev also.

On a side note, it looks like the system property 
jdk.net.enableFastFileTransfer would be better named
as jdk.nio.enableFastFileTransfer - I'll log a bug to get that corrected 
in JDK9, 8u & 7u.

regards,
Sean.

On 30/12/2014 04:22, Martin Sawicki (MS OPEN TECH) wrote:
> Hello,
>
>
>
> We'd like to propose to back-port our FileChannel.transferTo() performance improvement for Windows that was recently accepted into OpenJDK v9 and v8 to v7. The original JDKv9 fix just for reference: http://hg.openjdk.java.net/jdk9/dev/jdk/rev/ba6d8f56003b.
>
>
>
> Our suggested webrev patch for OpenJDK v7 is attached to this email, based on our understanding of the back-porting steps.
>
> 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.
>
>