[jira] [Created] (FLINK-3321) TupleSerializerBase.getLength should know the length when all fields know it

[Shang Yuanchun (Jira)]

Gabor Gevay created FLINK-3321:
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             Summary: TupleSerializerBase.getLength should know the length when all fields know it
                 Key: FLINK-3321
                 URL: https://issues.apache.org/jira/browse/FLINK-3321
             Project: Flink
          Issue Type: Improvement
          Components: Java API
            Reporter: Gabor Gevay
            Priority: Minor


TupleSerializerBase.getLength currently always returns -1, but it could actually know the length, when all the field serializers know their lengths (since no null can appear anywhere in Tuples, nor can a subclass of Tuple with additional fields appear).

(The serializer knowing the exact size has various performance benefits, for example see FixedLengthRecordSorter, or CompactingHashTable.getInitialTableSize.)



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