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From "Richard Eckart de Castilho (JIRA)" <...@uima.apache.org>
Subject [jira] [Commented] (UIMA-2385) Improve XmiCasDeserializer performance
Date Fri, 11 May 2012 15:38:48 GMT

    [ https://issues.apache.org/jira/browse/UIMA-2385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13273356#comment-13273356
] 

Richard Eckart de Castilho commented on UIMA-2385:
--------------------------------------------------

I think it could be useful as a tunable parameter in scenarios where many CASes are in memory
at the same time. Is there any particular reason that it should not be configurable?
                
> Improve XmiCasDeserializer performance
> --------------------------------------
>
>                 Key: UIMA-2385
>                 URL: https://issues.apache.org/jira/browse/UIMA-2385
>             Project: UIMA
>          Issue Type: Improvement
>          Components: Core Java Framework
>    Affects Versions: 2.4.0SDK
>            Reporter: Adam Lally
>            Assignee: Adam Lally
>
> I profiled an expensive CAS deserialization and found that 46% of the time was in CASImpl.ll_getFSForRef
(the method that creates a FeatureStructure Java object for a CAS FS).  All those calls were
coming from deserializing arrays (of which this particular CAS has many).
> It is unnecessary to create FeatureStructure Java objects here.  For non-array FSs, XmiCasDeserializer
uses low-level CAS APIs in order to avoid this overhead.  But for arrays, it currently does
not use the low-level APIs.

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