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From maropu <...@git.apache.org>
Subject [GitHub] spark pull request: [SPARK-13361][SQL] Add benchmark codes for Enc...
Date Wed, 17 Feb 2016 09:38:39 GMT
Github user maropu commented on the pull request:

    https://github.com/apache/spark/pull/11236#issuecomment-185117901
  
    @nongli This discussion comes from #10965;
    Before I make pr to improve compression performance of columnar caches, I have some questions
about `InMemoryRelation`. In the current codes of `InMemoryRelation`, `ColumnBuilder` buffers
input tuples in heap space and compresses them in bulk. Do you have any plan to use off-heap
for this compression processing in `ColumnBuilder`? IMO we can fix this by adding some functionality
in `ColumnVector` you implemented for parquet vectorized decoding, and then by using the extended
`ColumnVector` to buffer input tuples inside `ColumnBuilder`. What do you think?


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