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From "binlijin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17332) Replace HashMap to Array for DataBlockEncoding.idToEncoding
Date Tue, 20 Dec 2016 04:26:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15763201#comment-15763201
] 

binlijin commented on HBASE-17332:
----------------------------------

The UT failure is unrelated to this patch.



> Replace HashMap to Array for DataBlockEncoding.idToEncoding
> -----------------------------------------------------------
>
>                 Key: HBASE-17332
>                 URL: https://issues.apache.org/jira/browse/HBASE-17332
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 2.0.0
>            Reporter: binlijin
>            Assignee: binlijin
>             Fix For: 2.0.0
>
>         Attachments: DBE.idToEncoding.png, DBE.idToEncoding_afterOptimize.png, HBASE-17332.V2.patch,
HBASE-17332.V3.patch, HBASE-17332.branch-1.V1.patch, HBASE-17332.patch
>
>
> Array is faster than HashMap also no need to autoboxing.
> I can see the DataBlockEncoding#getDataBlockEncoderById is a hot method if enable encoding
in my perf test(Random read, all data cache in LruBlockCache). 



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