[jbossseam-issues] [JBoss JIRA] Commented: (JBSEAM-2704) Performance during iteration (datatable, repeat) in the UI with value bindings that run through interceptors

[Tobias Hill (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBSEAM-2704?page=comments#action_12412692 ] 
            
Tobias Hill commented on JBSEAM-2704:
-------------------------------------

Here is more data about it: http://www.seamframework.org/Community/SeamPerformanceProblemRewardingWorkaround

That thread lands in a "workaround DTO-pattern" for avoiding the repeated injection-overheads.  

It also provides some tools for finding similar problems over the set of beans (Pojos or SxSB) you have in your application.




> Performance during iteration (datatable, repeat) in the UI with value bindings that run through interceptors
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: JBSEAM-2704
>                 URL: http://jira.jboss.com/jira/browse/JBSEAM-2704
>             Project: Seam
>          Issue Type: Task
>          Components: Performance and Scalability
>    Affects Versions: 2.0.0.GA, 2.0.1.GA
>         Environment: Seam 2.0.0, 2.0.1
>            Reporter: Siarhei Dudzin
>
> "Since we don't cache this, a particular backing bean might be called hundreds or thousands of times during rendering of a datatable, if a value binding has to be evaluated for each row. If the backing bean is a Seam component, injection of dependencies will occur for every call, involving potentially thousands of map lookups."
> There is a discussion thread with a bit more data: http://www.seamframework.org/Community/SeamPerformanceOptimization
> The issue is also recognized at the seamframework.org site itself: http://www.seamframework.org/Documentation/TuningTheSeamWebsite#H-IterationDatatableRepeatInTheUIWithValueBindingsThatRunThroughInterceptors
> Since the issue it known, this JIRA report is created for better traceability.

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