[
https://issues.apache.org/jira/browse/DIRMINA-838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13048784#comment-13048784
]
Emmanuel Lecharny commented on DIRMINA-838:
-------------------------------------------
I have to check what kind of errors I had when I made this field a singleton. I
must admit we were more focused on sme other major bugs in MINA, so I cowardly
reverted my change...
In any case, we should be able to make this optionnal.
i'll investigate this point this week.
> Redundant AttributeKey allocation resulting in high garbage collector
> activity
> -------------------------------------------------------------------------------
>
> Key: DIRMINA-838
> URL: https://issues.apache.org/jira/browse/DIRMINA-838
> Project: MINA
> Issue Type: Improvement
> Components: Filter
> Affects Versions: 2.0.3
> Environment: java version "1.6.0_22"
> Java(TM) SE Runtime Environment (build 1.6.0_22-b04)
> Java HotSpot(TM) 64-Bit Server VM (build 17.1-b03, mixed mode)
> Reporter: Platon Potapov
>
> The classes CumulativeProtocolDecoder and ProtocolCodecFilter (there are
> others too, but these two are the important ones for our project) have
> members of type AttributeKey declared as:
> private final AttributeKey ENCODER = new
> AttributeKey(ProtocolCodecFilter.class, "encoder");
> As can be seen, these are not static, so each time ProtocolCodecFilter is
> created, AttributeKey objects get created as well, which in turn involves
> creation of a lot of String and char[] objects. jProfiler indicates that
> AttributeKey is accountable for creation of about 85% of all Strings and
> char[] in runs of our project, so it makes a significant difference for us.
> Is it OK for these attribute key objects to be singletons? If not, what would
> take to make them singletons?
> Some of other MINA filters have AttributeKeys as static members (e.g.
> MdcInjectionFilter, SslFilter).
> To summarize: the improvement being requested is to make the pre-defined
> AttributeKey objects static within classes such as CumulativeProtocolDecoder
> and ProtocolCodecFilter.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
