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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14628) [0.98] Save object creation for scanning with block encodings
Date Tue, 20 Oct 2015 20:47:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14965720#comment-14965720
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Lars Hofhansl commented on HBASE-14628:
---------------------------------------

Filed sub task (HBASE-14657) to remove the API from EncodedSeeker in 1.0+

> [0.98] Save object creation for scanning with block encodings
> -------------------------------------------------------------
>
>                 Key: HBASE-14628
>                 URL: https://issues.apache.org/jira/browse/HBASE-14628
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>             Fix For: 0.98.16
>
>         Attachments: 14628-0.98-v2.txt, 14628-0.98.txt
>
>
> I noticed that (at least in 0.98 - master is entirely different) we create ByteBuffer
just to create a byte[], which is then used to create a KeyValue.
> We can save the creation of the ByteBuffer and hence save allocating an extra object
for each KV we find by creating the byte[] directly.
> In a Phoenix count\(*) query that saved from 10% of runtime.



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