Discussion: Efficient ByteBuffer -> String that avoids additional copying

[Claes Redestad]

Hi,

I'd just like to point out there's been some recent effort on this, see:

  https://bugs.openjdk.java.net/browse/JDK-8021560

.. which was RFR'd here:

  http://mail.openjdk.java.net/pipermail/core-libs-dev/2018-February/051401.html

I'm not sure what the current status of that is, but seems there's more than
a bit of overlap with what's being suggested here.

/Claes

On 2018-05-16 18:42, Jacob Glickman wrote:
> Paul,
>
> Would you mind explaining more about what you're looking for regarding
> this?  I'm curious if `ByteBuffer#getString` is what you're after, or
> rather something similar to `String.from(ByteBuffer)`.  I'll definitely
> have a look at jdk.internal.misc.SharedSecrets in the meantime.  Thanks!
>
> - Jacob
>
>> Hi Jacob,
>> I do have one idea (that i don’t think is currently represented as a bug,
> though i have not searched JBS), if you are willing to take it on. It will
> require some investigation, and careful testing, it’s not necessarily a
> starter bug :-), but i can help guide.
>> Investigate new methods to more efficiently support ByteBuffer -> String
> method on ByteBuffer that can avoid additional copying and makeappropriate
> use of charsets given String’s compact string support. You need to look at
> jdk.internal.misc.SharedSecrets for clues on how to trampoline between the
> nio and lang packages.
>> Paul.