[jira] Closed: (UIMA-500) Reduce excessive synch lock contention caused by calls to ll_isValidTypeCode that are not needed

["Marshall Schor (JIRA)" <ui...@incubator.apache.org>]

     [ https://issues.apache.org/jira/browse/UIMA-500?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marshall Schor closed UIMA-500.
-------------------------------

    Resolution: Fixed

Done.  All tests run.  

> Reduce excessive synch lock contention caused by calls to ll_isValidTypeCode that are not needed
> ------------------------------------------------------------------------------------------------
>
>                 Key: UIMA-500
>                 URL: https://issues.apache.org/jira/browse/UIMA-500
>             Project: UIMA
>          Issue Type: Improvement
>    Affects Versions: 2.1
>            Reporter: Marshall Schor
>            Assignee: Marshall Schor
>             Fix For: 2.2
>
>
> User reports slowdown as the number of threads are increased; traced to lock contention in Vector.get() method; call trace is:
> XmiCasSerializer$XmiCasDocSerializer.<many places>
> CASImpl.ll_getTypeClass(int)
> TypeSystemImpl.subsumes(int, int)
> TypeSystemImpl.ll_subsumes(int, int)
> TypeSystemImpl.ll_isArrayType(int)
> TypeSystemImpl.ll_isValidTypeCode(int)    <<< Not needed
> SymbolTable.getSymbol(int)
> Vector.get(int)
> The callers of ll_isValidTypeCode include this caller and another (ll_getStringSet), where the call can be omitted without affecting the returned value.

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