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https://issues.apache.org/jira/browse/HBASE-14628?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lars Hofhansl updated HBASE-14628:
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Attachment: 14628-0.98.txt
Found the problem. Here's a 0.98 patch.
The actual macro win is 5% (not the 10% I promised above).
Readability is roughly equal, I feel. Have a look and let me whether it's worth
the change.
> 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
> Attachments: 14628-0.98.txt
>
>
> 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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