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Posted to issues@flink.apache.org by "Till Rohrmann (JIRA)" <ji...@apache.org> on 2017/05/30 06:37:05 UTC

[jira] [Created] (FLINK-6768) Quadratic/Inefficient field lookup in PojoSerializer#ensureCompatibility

Till Rohrmann created FLINK-6768:
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             Summary: Quadratic/Inefficient field lookup in PojoSerializer#ensureCompatibility
                 Key: FLINK-6768
                 URL: https://issues.apache.org/jira/browse/FLINK-6768
             Project: Flink
          Issue Type: Improvement
          Components: State Backends, Checkpointing, Type Serialization System
    Affects Versions: 1.3.0, 1.4.0
            Reporter: Till Rohrmann
            Priority: Minor


In the {{PojoSerializer#ensureCompatibility}} method we call for each field in the {{PojoSerializerConfigSnapshot}} the {{findField}} method which executes a linear scan of the array of fields of the {{PojoSerializer}}. This effectively has a quadratic runtime and could be done more efficiently. For example, we could construct a {{HashMap}} containing the fields as keys and the index as values. That way we would have a have a better lookup performance.



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