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Posted to issues@kylin.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2018/01/02 04:12:03 UTC

[jira] [Created] (KYLIN-3144) Adopt Collections.emptyList() for empty list values

Ted Yu created KYLIN-3144:
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             Summary: Adopt Collections.emptyList() for empty list values
                 Key: KYLIN-3144
                 URL: https://issues.apache.org/jira/browse/KYLIN-3144
             Project: Kylin
          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 HybridService#listHybrids()



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