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https://issues.apache.org/jira/browse/CAMEL-6377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13669105#comment-13669105
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Claus Ibsen commented on CAMEL-6377:
------------------------------------

We can optimize a number of internal producers, that can only send to internal 
routes (eg seda / direct) to not use the unit of work producer from the 
producer cache, as its not needed. The routes they send to has already UoW.

                
> Optimize routing engine to reduce stack frames in use during routing and 
> reduce callbacks
> -----------------------------------------------------------------------------------------
>
>                 Key: CAMEL-6377
>                 URL: https://issues.apache.org/jira/browse/CAMEL-6377
>             Project: Camel
>          Issue Type: Improvement
>          Components: camel-core
>    Affects Versions: 2.12.0
>            Reporter: Claus Ibsen
>            Assignee: Claus Ibsen
>             Fix For: 2.12.0
>
>
> We can optimize the Camel routing engine internally, and redue the need for 
> wrapping processors (those internally used for cross cutting functionality) 
> where they would wrap each other one by one; which then results in larger 
> call stacks during routing.
> This also shows to end users when stacktraces is being logged etc, as they 
> tend to be a bit longer with many internal calls.
> Though the JVM optimizes this at runtime as it can inline the calls and 
> whatnot. But the stacktraces is still shown expanded.

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