Details

    • Type: Sub-task
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: Impala 2.8.0
    • Fix Version/s: Impala 2.8.0
    • Component/s: Backend
    • Labels:
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      Description

      To speed up parquet decoding we need fast bit unpacking functions, e.g. along the lines of https://github.com/lemire/FrameOfReference

      Our current BitReader unpacks a value at a time and has a lot of unnecessary branches and other calculations.

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            • Assignee:
              tarmstrong Tim Armstrong
              Reporter:
              tarmstrong Tim Armstrong
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