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  1. Hive
  2. HIVE-12086

ORC: Buffered float readers to remove vtable thunks

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    Details

    • Type: Bug
    • Status: Open
    • Priority: Minor
    • Resolution: Unresolved
    • Affects Version/s: 1.3.0, 2.0.0
    • Fix Version/s: None
    • Component/s: File Formats
    • Labels:
      None

      Description

      ORC float tree reader spends an inordinate amount of time, doing vtable thunks through InputStream interface.

      The actual operation is not faster with this patch, but the interface lookup goes down ~4x.

        Attachments

        1. HIVE-12086.1.patch
          2 kB
          Gopal Vijayaraghavan
        2. HIVE-12086.2.patch
          3 kB
          Gopal Vijayaraghavan
        3. perf-top-floatreader.jpg
          223 kB
          Gopal Vijayaraghavan

          Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. HIVE-12737 orc Instream.java CompressedStream.readHeader() can meet error when read double.

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Open

            Activity

              People

              • Assignee:
                gopalv Gopal Vijayaraghavan
                Reporter:
                gopalv Gopal Vijayaraghavan
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                Dates

                • Created:
                  Updated: