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  1. Hive
  2. HIVE-12086

ORC: Buffered float readers to remove vtable thunks

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Details

    • Bug
    • Status: Open
    • Minor
    • Resolution: Unresolved
    • 1.3.0, 2.0.0
    • None
    • File Formats
    • 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-12086.2.patch
          3 kB
          Gopal Vijayaraghavan
        2. perf-top-floatreader.jpg
          223 kB
          Gopal Vijayaraghavan
        3. HIVE-12086.1.patch
          2 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

              gopalv Gopal Vijayaraghavan
              gopalv Gopal Vijayaraghavan
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              Dates

                Created:
                Updated: