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https://issues.apache.org/jira/browse/HBASE-15509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15205761#comment-15205761
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ramkrishna.s.vasudevan commented on HBASE-15509:
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All these are in our TODO list while doing our POC on write path.
This is the biggest garbage generator. Planning to add an byte[] pool?
> Avoid copy of block data in HFileBlock$Writer.finishBlock
> ---------------------------------------------------------
>
> Key: HBASE-15509
> URL: https://issues.apache.org/jira/browse/HBASE-15509
> Project: HBase
> Issue Type: Improvement
> Components: HFile
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
>
> This calls ByteArrayOutputStream.toByteArray() which creates a copy of data
> block.
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