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Posted to issues@systemml.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2018/01/02 04:43:00 UTC

[jira] [Created] (SYSTEMML-2056) Adopt Collections.emptyList() for empty list values

Ted Yu created SYSTEMML-2056:
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             Summary: Adopt Collections.emptyList() for empty list values
                 Key: SYSTEMML-2056
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2056
             Project: SystemML
          Issue Type: Improvement
            Reporter: Ted Yu
            Priority: Minor


Use Collection.emptyList() for returning an empty list instead of returning new ArrayList<>().

The default constructor creates a buffer of size 10 for ArrayList . Therefore, returning this static value saves some memory and lessens GC pressure.

One candidate for replacement is in StatementBlock#mergeStatementBlocks



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