[jbossts-issues] [JBoss JIRA] (JBTM-1340) BeanPopulator overhead needs looking into

[Tom Jenkinson (JIRA)]

    [ https://issues.jboss.org/browse/JBTM-1340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12732669#comment-12732669 ] 

Tom Jenkinson commented on JBTM-1340:
-------------------------------------

I guess I need to look into this a bit more, but I think that should be a one-off cost? Not that we shouldn't optimize it as L
1. there could be use cases to deploy JBTM just to run a single transaction then to passivate somehow
2. we may want to support reloading config.
3. we may need to optimize boot time costs
But to confirm the priority, I think this should be a one-off cost per boot of the TM?

Also, please can you confirm the tool you are using to generate the profile (command line parameters too if possible) and maybe your test case if possible.
                
> BeanPopulator overhead needs looking into
> -----------------------------------------
>
>                 Key: JBTM-1340
>                 URL: https://issues.jboss.org/browse/JBTM-1340
>             Project: JBoss Transaction Manager
>          Issue Type: Task
>      Security Level: Public(Everyone can see) 
>          Components: Common
>    Affects Versions: 4.17.2
>         Environment: Mac OS 10.7
>            Reporter: Mark Little
>            Assignee: Tom Jenkinson
>             Fix For: 5.0.0.Final
>
>
> During profiling, BeanPopulator can represent a 7% overhead. It may not seem like a lot, but for something as relatively simple as what BeanPopulator should be doing, it seems to be quite a bit.
>   6.9% - 4,477 ms - 10,000 inv. com.arjuna.ats.arjuna.coordinator.TxStats.enabled
>   6.9% - 4,477 ms - 10,000 inv. com.arjuna.ats.arjuna.common.arjPropertyManager.getCoordinatorEnvironmentBean
>   6.9% - 4,476 ms - 10,000 inv. com.arjuna.common.internal.util.propertyservice.BeanPopulator.getDefaultInstance
>   6.9% - 4,476 ms - 10,000 inv. com.arjuna.common.internal.util.propertyservice.BeanPopulator.getNamedInstance
>   2.5% - 1,587 ms - 10,000 inv. java.lang.StringBuilder.<init>
>   2.3% - 1,507 ms - 10,000 inv. java.lang.StringBuilder.toString
>   0.0% - 320 µs - 10,000 inv. java.util.concurrent.ConcurrentMap.containsKey
>   0.0% - 61 µs - 10,000 inv. java.lang.Class.getName
>   0.0% - 25 µs - 10,000 inv. java.util.concurrent.ConcurrentMap.get

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