[jira] Resolved: (TUSCANY-1136) [SDO for C++] getProperties returns a copy of the property list which is expensive and often unnecessary

["Geoff Winn (JIRA)" <tu...@ws.apache.org>]

     [ https://issues.apache.org/jira/browse/TUSCANY-1136?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Geoff Winn resolved TUSCANY-1136.
---------------------------------

    Resolution: Fixed

Revised use of Type::getProperties built and tested on XP, RHEL3 and Ubuntu.

Using sdotest, callgrind shows time spent in getProperties dropped from just over 30% to just under 5%.

> [SDO for C++] getProperties returns a copy of the property list which is expensive and often unnecessary
> --------------------------------------------------------------------------------------------------------
>
>                 Key: TUSCANY-1136
>                 URL: https://issues.apache.org/jira/browse/TUSCANY-1136
>             Project: Tuscany
>          Issue Type: Improvement
>          Components: C++ SDO
>    Affects Versions: Cpp-current
>         Environment: All
>            Reporter: Geoff Winn
>         Assigned To: Geoff Winn
>             Fix For: Cpp-current
>
>
> The Type::getProperties method returns a PropertyList object. This behaviour is required by the specification however it is inefficient when the PropertyList in question is subsequently used in a read-only manner - which is the common case within SDO. According to callgrind, approximately 30% of the execution time of the sdotest program is spent in getProperties. By adding a new method, such as
> const PropertyList& Type::getPropertyListReference()
> we can preserve the interface required by the specification but give ourselves the option to use the more efficient form whenever possible.

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