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https://issues.apache.org/jira/browse/PHOENIX-1280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14144372#comment-14144372
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James Taylor commented on PHOENIX-1280:
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What should we call it? BytesPtrToImmutableByteArray? :-)
Two points:
- if you're not using the ImmutableBytesPtr as a key in a Map, you can just
reuse it as you've mentioned.
- if you're not doing many comparisons against it, ImmutableBytesWritable is a
better choice, as the only difference is that ImmutableBytesPtr caches the hash
code.
> 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: Anoop Sam John
>
> 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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