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Posted to issues@hbase.apache.org by "Anoop Sam John (JIRA)" <ji...@apache.org> on 2015/10/16 14:16:05 UTC

[jira] [Commented] (HBASE-14628) Save object creation for scanning with FAST_DIFF encoding

    [ https://issues.apache.org/jira/browse/HBASE-14628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14960575#comment-14960575 ] 

Anoop Sam John commented on HBASE-14628:
----------------------------------------

In master we have avoided many of such cases from read path.

> Save object creation for scanning with FAST_DIFF encoding
> ---------------------------------------------------------
>
>                 Key: HBASE-14628
>                 URL: https://issues.apache.org/jira/browse/HBASE-14628
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>
> 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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