[jboss-jira] [JBoss JIRA] Updated: (BPEL-311) Performance improvement: Find a way to reduce number of org.jbpm.bpel.graph.def.CompositeActivity.findVariable() calls

Wed Oct 14 08:58:05 EDT 2009

     [ https://jira.jboss.org/jira/browse/BPEL-311?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aleksander Adamowski updated BPEL-311:
--------------------------------------

    Attachment: org.jbpm.bpel.graph.def.CompositeActivity.findVariable.Call_graph.single_operation-expanded.png

Here's a simple call graph from JProfiler, illustrating who calls who.

Notice how the calls to findVariable are recursive, and how their invocations are passed through Hibernate's JavassistLazyInitializer, putting great stress on Hibernate as a side effect.

> Performance improvement: Find a way to reduce number of org.jbpm.bpel.graph.def.CompositeActivity.findVariable() calls
> ----------------------------------------------------------------------------------------------------------------------
>
>                 Key: BPEL-311
>                 URL: https://jira.jboss.org/jira/browse/BPEL-311
>             Project: jBPM BPEL
>          Issue Type: Task
>      Security Level: Public(Everyone can see) 
>          Components: Engine
>    Affects Versions: jBPM BPEL 1.1.1
>            Reporter: Aleksander Adamowski
>            Assignee: Alejandro Guizar
>         Attachments: org.jbpm.bpel.graph.def.CompositeActivity.findVariable.Call_graph.single_operation-expanded.png
>
>
> According to our profiling data, during a single invocation of a relatively simple business process (cannot post it here for confidentiality reasons), jBPM-BPEL performs an unreasonable number of findVariable() calls.
> Using JProfiler, we've recorded almost 150000 findVariable() calls for a single process execution (the process definition contains only 31 bpws:variable elements collectively).
> I suspect that there's some algorithm which runs in exponential time with respect to the number of variables or activities. Maybe adding some form of variable caching could enable dramatic performance improvements?

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira