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Posted to dev@parquet.apache.org by "David Mollitor (Jira)" <ji...@apache.org> on 2020/01/12 15:48:00 UTC

[jira] [Created] (PARQUET-1759) InternalParquetRecordReader Use Singleton Set

David Mollitor created PARQUET-1759:
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             Summary: InternalParquetRecordReader Use Singleton Set
                 Key: PARQUET-1759
                 URL: https://issues.apache.org/jira/browse/PARQUET-1759
             Project: Parquet
          Issue Type: Improvement
            Reporter: David Mollitor
            Assignee: David Mollitor


https://github.com/apache/parquet-mr/blob/d85a8f5dcfc1381655fcccaa81a2e83ba812f6a4/parquet-hadoop/src/main/java/org/apache/parquet/hadoop/InternalParquetRecordReader.java#L260-L262

Code currently instantiates a {{HashSet}} (with a default internal data structure of size 16}} and then makes it immutable.  Use Collection#singleton to achieve this same goal with fewer lines of code and less memory requirements.



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