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Posted to issues@spark.apache.org by "Norman Maurer (JIRA)" <ji...@apache.org> on 2018/08/14 17:12:00 UTC

[jira] [Commented] (SPARK-25115) Eliminate extra memory copy done when a ByteBuf is used that is backed by > 1 ByteBuffer.

    [ https://issues.apache.org/jira/browse/SPARK-25115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16580087#comment-16580087 ] 

Norman Maurer commented on SPARK-25115:
---------------------------------------

I opened the following PR to fix it:

 

https://github.com/apache/spark/pull/22105

>     Eliminate extra memory copy done when a ByteBuf is used that is backed by > 1 ByteBuffer.
> ---------------------------------------------------------------------------------------------
>
>                 Key: SPARK-25115
>                 URL: https://issues.apache.org/jira/browse/SPARK-25115
>             Project: Spark
>          Issue Type: Improvement
>          Components: Input/Output
>    Affects Versions: 2.3.1
>            Reporter: Norman Maurer
>            Priority: Major
>
> Calling ByteBuf.nioBuffer(...) can be costly when the ByteBuf is backed by more then 1 ByteBuf. In this case it makes more sense to call ByteBuf.nioBuffers(...) and iterate over the returned ByteBuffer[].



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