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  1. Hive
  2. HIVE-18866

Semijoin and analyze: Implement a Long -> Hash64 vector fast-path

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    • Target Version/s:

      Description

      A significant amount of CPU is wasted with JMM restrictions on byte[] arrays.

      To transform from one Long -> another Long, this goes into a byte[] array, which shows up as a hotspot.

        Attachments

        1. 0001-hash64-WIP.patch
          10 kB
          Gopal Vijayaraghavan
        2. HIVE-18866.01.patch
          11 kB
          Sergey Shelukhin
        3. HIVE-18866.02.patch
          11 kB
          Sergey Shelukhin
        4. HIVE-18866.03.patch
          11 kB
          Sergey Shelukhin
        5. HIVE-18866.04.patch
          11 kB
          Sergey Shelukhin
        6. HIVE-18866.patch
          11 kB
          Sergey Shelukhin
        7. perf-hash64-long.png
          232 kB
          Gopal Vijayaraghavan

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              • Assignee:
                gopalv Gopal Vijayaraghavan
                Reporter:
                gopalv Gopal Vijayaraghavan
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                • Created:
                  Updated:
                  Resolved: