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https://issues.apache.org/jira/browse/HBASE-13427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14493248#comment-14493248
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stack commented on HBASE-13427:
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[~jleach] Did you see improvement when you applied your patch?
I tried it in a little test (attached) and with the patch, we slow down. If no
hash nor equals, we'll do Object hash and equals which will be pretty cheap as
I read it:
http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b14/java/lang/Object.java#Object.hashCode%28%29
Thanks.
> HStore#addChangedReaderObserver hotspots due to missing hashCode and equals
> on StoreScanner
> -------------------------------------------------------------------------------------------
>
> Key: HBASE-13427
> URL: https://issues.apache.org/jira/browse/HBASE-13427
> Project: HBase
> Issue Type: Bug
> Reporter: John Leach
> Assignee: John Leach
> Attachments: 13427-v4.txt, HBASE-13427.patch,
> HBASE-13427_CURLY_BRACES.patch, HBASE-13427_V3.patch,
> SetFromMap.add_Runnable.tiff
>
> Original Estimate: 2h
> Time Spent: 2h
> Remaining Estimate: 0h
>
> Please see attached graph...
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