[jbossts-issues] [JBoss JIRA] (JBTM-2180) Determine whether or not we should use a specific collections framework

Mark Little (JIRA) issues at jboss.org
Tue May 20 08:18:56 EDT 2014

    [ https://issues.jboss.org/browse/JBTM-2180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12969025#comment-12969025 ] 

Mark Little commented on JBTM-2180:

Yes. I know BasicAction uses Hashtable for maintaining child thread and actions, but since concurrent threads in the same transaction or nested transactions aren't used much, this may not be a problem there. StateManager's use of Hashtable may be a different matter though, since StateManager is used everywhere.

However, having a good analysis of the overhead is definitely the right first step. Then at least if we make no changes we can do so based on facts and not supposition. Also precisely which collections framework we might use were it to be necessary, is a job in its own right :-) 

> Determine whether or not we should use a specific collections framework
> -----------------------------------------------------------------------
>                 Key: JBTM-2180
>                 URL: https://issues.jboss.org/browse/JBTM-2180
>             Project: JBoss Transaction Manager
>          Issue Type: Task
>      Security Level: Public(Everyone can see) 
>          Components: JTA, JTS, Performance Testing, REST, Transaction Core
>    Affects Versions: 5.0.1
>            Reporter: Mark Little
>            Assignee: Michael Musgrove
> We use many of the inbuilt collections implementations (such as Hashtable) which are well known to be suboptimal in certain cases. Should we use a separate collections framework, e.g., https://github.com/goldmansachs/gs-collections
> There are pros and cons of doing this. But first we need to determine whether it really makes sense from a performance perspective.

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