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Date: Thu, 25 Aug 2016 00:53:20 +0000 (UTC)
From: "Duo Zhang (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12999782.1472069147000.404165.1472086400522@Atlassian.JIRA>
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Subject: [jira] [Commented] (HBASE-16496) Hotspotting on
 SequenceIDAccounting during HLOG Performance Test
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archived-at: Thu, 25 Aug 2016 00:53:22 -0000


    [ https://issues.apache.org/jira/browse/HBASE-16496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15436051#comment-15436051 ] 

Duo Zhang commented on HBASE-16496:
-----------------------------------

Why HashedBytes could be faster than byte[]? I think HashMap will treat byte[] just as an object which means we will use Object.hashCode as hashCode, and the equals will base on address?

Thanks. 

> Hotspotting on SequenceIDAccounting during HLOG Performance Test
> ----------------------------------------------------------------
>
>                 Key: HBASE-16496
>                 URL: https://issues.apache.org/jira/browse/HBASE-16496
>             Project: HBase
>          Issue Type: Bug
>            Reporter: John Leach
>            Assignee: John Leach
>            Priority: Trivial
>         Attachments: HBASE-16496.patch, HashMap_Hotspot.tiff
>
>
> I was seeing this hotspot for me during my tests.
> Adding Pic.


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