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https://issues.apache.org/jira/browse/PHOENIX-1280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14145314#comment-14145314
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Lars Hofhansl commented on PHOENIX-1280:
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I think this is good to go. A profile shows that this reduces the number of
created ImmutableBytesPtr significantly. It also shaves a second or so off from
a scan over 40m rows with 5 integer columns each... From 13.7s to 12.3s.
Will commit to master and 4.0 branch unless I hear objections.
What about 3.0?
> ColumnProjectionFilter makes too many ImmutableBytesPtrs
> --------------------------------------------------------
>
> Key: PHOENIX-1280
> URL: https://issues.apache.org/jira/browse/PHOENIX-1280
> Project: Phoenix
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Attachments: 1280-WIP.txt
>
>
> While tracing through allocated objects during some queries I find that many
> ImmutableBytesPtr objects are created. One offender is ColumnProjectionFilter
> which first creates the columns to be projected and then while scanning make
> a new ImmutableBytesPtr for each single column that passes through the filter.
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