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https://issues.apache.org/jira/browse/NIFI-3636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15945075#comment-15945075
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ASF GitHub Bot commented on NIFI-3636:
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Github user mattyb149 commented on the issue:
https://github.com/apache/nifi/pull/1612
Reviewing...
> Session should not copy FlowFile Attribute Map when creating new FlowFile
> object unless attributes are changing
> ---------------------------------------------------------------------------------------------------------------
>
> Key: NIFI-3636
> URL: https://issues.apache.org/jira/browse/NIFI-3636
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Reporter: Mark Payne
> Assignee: Mark Payne
> Fix For: 1.2.0
>
>
> Currently, each time we create a new FlowFile object, we do so using
> StandardFlowFileRecord.Builder and then call fromFlowFile(FlowFile). This
> copies the attributes map of the given FlowFile. We should instead just set
> the member variable of the builder to point at the same Map object as the
> given FlowFile and keep a flag indicating whether or not this was done. If
> this is done, we must lazily copy the hash map before modifying it.
> Otherwise, we can point to the same Map object.
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