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  1. IMPALA
  2. IMPALA-3674

Lazy materialization of LLVM bitcode

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: Impala 2.6.0
    • Fix Version/s: None
    • Component/s: Backend

      Description

      LLVM supports on demand materialization of the bitcode in a module. This helps reduce the preparation time especially for short running queries. Currently, prepare time is a fixed cost of about 140+ ms on my dev box. Lazy materialization can drive this down to 20ms ~ 50ms. This also reduces the time spent in dead code elimination.

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            • Assignee:
              kwho Michael Ho
              Reporter:
              kwho Michael Ho
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              • Created:
                Updated:
                Resolved: