2012/3/9 Martin Koci <[email protected]>:
> Hi,
>
> we did performance tests in myfaces core project recently and we found
> two performance problems in tomcat (7.0.26):
>
>
> 1) javax.el.ExpressionFactory.newInstance() does not cache instance
> created with javax.el.ExpressionFactory.newInstance. - every invocation
> of this method reads service .properties file again and accesses disk.
> This was discussed a time ago [1], but I forgot to report it.
+1.
>
> 2) org.apache.catalina.core.ContainerBase.fireContainerEvent;
> That method contains critical section:
> synchronized (listeners) {
> list = listeners.toArray(list);
> }
>
> Is is called pretty often with every put operation into request or
> session map.
I see fireContainerEvent() calls in StandardSession.
Moreover those are N x M loops: a loop in StandardSession over array
of context.getApplicationEventListeners(); x a loop inside of
context.fireContainerEvent().
+1 to file.
I do not see such calls in relation to request. Where have you seen them?
> That code in tomcat looks like a candidate for
> CopyOnWriteArrayList
Will it eliminate a need for List -> Object[] conversions?
Just a simple solution might be a ReadWriteLock.
> Can I create a bugzilla ticket fot those two?
>
> Regards,
>
> Kočičák
>
> [1] http://www.mail-archive.com/[email protected]/msg48482.html
>
Best regards,
Konstantin Kolinko
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