[jira] [Resolved] (CAMEL-19319) Type check misses

["Otavio Rodolfo Piske (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CAMEL-19319?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Otavio Rodolfo Piske resolved CAMEL-19319.
------------------------------------------
    Resolution: Fixed

Incidences of type check misses still exist, but they have been significantly reduced in the current code. Therefore, closing.

> Type check misses
> -----------------
>
>                 Key: CAMEL-19319
>                 URL: https://issues.apache.org/jira/browse/CAMEL-19319
>             Project: Camel
>          Issue Type: Task
>          Components: came-core
>    Affects Versions: 4.0-M2
>            Reporter: Otavio Rodolfo Piske
>            Assignee: Otavio Rodolfo Piske
>            Priority: Major
>             Fix For: 4.0-RC1
>
>         Attachments: type-check-report.txt
>
>
> Within the core code there are many circumstances where the type checks performed by our code, causes the JVM to miss a cache hit and enter a slower code path. 
> This can be caused when type check (such as an {{instanceof}} check) fails for a class instance which implements multiple types (incurring in both a cache a traversal of the secondary supers ArrayList). 
> The [type-pollution-agent|https://github.com/RedHatPerf/type-pollution-agent] can be used to identify where this happen. A report is attached to this ticket.



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