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

["Greg Hogan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-3321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15184860#comment-15184860 ] 

Greg Hogan commented on FLINK-3321:
-----------------------------------

That commit ID is correctly noted for FLINK-3309.

This ticket is implemented in d7aa989ee1c72d7830c612554b89673bf38cf447

> 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
>            Assignee: Chesnay Schepler
>            Priority: Minor
>              Labels: starter
>
> 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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