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Posted to dev@sling.apache.org by "Konrad Windszus (Jira)" <ji...@apache.org> on 2021/12/06 16:08:00 UTC
[jira] [Assigned] (SLING-10969) Remove synchronized & rest of accessible flag during injection
[ https://issues.apache.org/jira/browse/SLING-10969?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Konrad Windszus reassigned SLING-10969:
---------------------------------------
Assignee: Konrad Windszus
> Remove synchronized & rest of accessible flag during injection
> --------------------------------------------------------------
>
> Key: SLING-10969
> URL: https://issues.apache.org/jira/browse/SLING-10969
> Project: Sling
> Issue Type: Improvement
> Components: Sling Models
> Affects Versions: Models Implementation 1.4.16
> Reporter: Paul Bjorkstrand
> Assignee: Konrad Windszus
> Priority: Major
> Fix For: Models Implementation 1.5.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> To improve multithreaded performance of Sling Models, the {{synchronized}} blocks, along with the "reset" of the {{setAccessible}} using its original value should be removed.
> Context:
> The synchronized blocks were added to resolve a race condition [1]. After looking into another large project that uses reflection to access members of classes (Felix [2]), nowhere in that project is something similar being done. Every reflective access is just doing {{setAccessible(true)}}.
> Results from a JMH test allude to a significant performance improvement during multithreaded threaded access by removing the synchronized (JMH results [3]).
> [1]: SLING-6584
> [2]: https://github.com/apache/felix-dev/search?q=setAccessible
> [3]: https://gist.github.com/paul-bjorkstrand/f3bb154665e7d2168b4656eb7b794496
> [4]: https://www.mail-archive.com/dev@sling.apache.org/msg113123.html
> [5]: https://github.com/apache/sling-org-apache-sling-models-impl/pull/11
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