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Posted to dev@tapestry.apache.org by "Howard M. Lewis Ship (JIRA)" <de...@tapestry.apache.org> on 2008/03/01 03:57:51 UTC

[jira] Updated: (TAPESTRY-1861) Frequently instantiated service implementations should have a specialized instantiation class created to prevent extra reflection calls

     [ https://issues.apache.org/jira/browse/TAPESTRY-1861?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Howard M. Lewis Ship updated TAPESTRY-1861:
-------------------------------------------

    Fix Version/s: 5.1

> Frequently instantiated service implementations should have a specialized instantiation class created to prevent extra reflection calls
> ---------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: TAPESTRY-1861
>                 URL: https://issues.apache.org/jira/browse/TAPESTRY-1861
>             Project: Tapestry
>          Issue Type: Improvement
>          Components: tapestry-ioc
>    Affects Versions: 5.0.6
>            Reporter: Howard M. Lewis Ship
>            Priority: Minor
>             Fix For: 5.1
>
>
> From the department of premature optimization:
> For services that are scope "perthread", the service implementation will be invoked repeatedly, via either invoking a constructor, or invoking a (static or instance) builder method on a module class.
> Currently each such instantiation requires calculating the method/constructor parameters (somewhat expensive) and invocations of the method/constructor via reflection (borderline expensive).  
> The code responsible for this could track the number of instantitations and, on the second (or later) pass, create a "shim" class responsible for performing the same operations in a non-reflective way.

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