[jboss-user] [JBoss Seam] - Re: JBoss EL performance vs Sun EL

gonzalad do-not-reply at jboss.com
Thu Nov 22 07:45:30 EST 2007


I've also some serious performance problems with Jsf/Seam.

Some of these problems is due to SeamELResolver|getValue.

My sample application can stand only 3 users (no think time).
The application consumes 50% of the cpu (AIX system - don't have now the processor caractéristics).
Average response time = 0,5s - 8tx/s - average page size 55ko (html) .

Profiled a page (it's search page with 2 criteria that renders a list) with Wily Introscope.
24.3% of request duration is due to 
which calls Namespace.getComponentInstance in a loop.
each call to Namespace.getComponentInstance consumes between 2 ou 4 ms.
2% for my Action execution (which calls jpa).

I can send the full trace if you're interested (size=400Mo).

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