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https://issues.apache.org/jira/browse/HBASE-14628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14961732#comment-14961732
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Lars Hofhansl commented on HBASE-14628:
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[~anoop.hbase]
Master still creates a ByteBuffer on the way before it creates the Cell. For
offheap that's unavoidable, but it still does for onheap if I am not mistaken.
Lemme take another look, I agree it looks better there.
[~stack] I have a patch, but it fails one of the interesting tests, will post
as soon as I have that fixed.
> 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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