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https://issues.apache.org/jira/browse/CASSANDRA-12013?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stefania updated CASSANDRA-12013:
---------------------------------
Component/s: Local Write-Read Paths
Compaction
> Optimize the isEOF() checking in RAR
> ------------------------------------
>
> Key: CASSANDRA-12013
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12013
> Project: Cassandra
> Issue Type: Improvement
> Components: Compaction, Local Write-Read Paths
> Reporter: Dikang Gu
> Assignee: Dikang Gu
> Priority: Minor
> Labels: compaction
> Fix For: 2.2.7
>
> Attachments: 0001-Optimize-the-isEOF-checking-in-RAR.patch,
> Screenshot 2016-06-15 11.20.51.png
>
>
> When I profile compaction in 2.1, I find the isEOF() is an expensive
> operation, and we do the check for each read in RAR, which I think is
> unnecessary.
> I attach a patch to only check isEOF() when we need to rebuffer, and then I
> do not see it from hotspot.
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