[wildfly-dev] CDI overhead

[Andrig Miller]

----- Original Message -----

> From: "Jozef Hartinger" <jharting at redhat.com>
> To: "Andrig Miller" <anmiller at redhat.com>, "wildfly-dev"
> <wildfly-dev at lists.jboss.org>
> Sent: Monday, June 30, 2014 4:03:59 AM
> Subject: Re: [wildfly-dev] CDI overhead

> I guess that the Weld subsystem is enabled for your deployment
> because the deployment contains session beans. CDI is required to be
> enabled for such deployments since CDI 1.1 (even though CDI may not
> actually be used by your application).

Why is it required, if it will never be used? Is that really what the spec says? If so, why in the world would be support that in the spec? That simply doesn't make any sense to me. Perhaps I'm missing something here. 

Andy 

> Alternatively to removing the Weld subsystems you can:

> 1) Suppress implicit bean archives - only archives with explicit
> beans.xml file will trigger CDI enablement. See
> http://weld.cdi-spec.org/documentation/#4

> 2) Enable CDI contexts for certain URL subset only:
> http://docs.jboss.org/weld/reference/2.2.2.Final/en-US/html/configure.html#context.mapping

> Jozef

> On 06/27/2014 06:44 PM, Andrig Miller wrote:

> > I should have posted this some time ago, but just forgot.
> 

> > In my early testing of Wildfly 8, CDI adds quite a bit of overhead
> > (12% reduction in throughput) for even an application that only
> > uses
> > servlets. The only way I could get that back was to remove the
> > subsystem. In talking with Stuart at the time, he was looking at
> > ways to make the overhead less.
> 

> > Is there anything on the docket for making this overhead go away
> > for
> > deployments that don't require CDI? If not, can we get something
> > going in that direction. It would be great to not have to remove
> > the
> > CDI subsystem, but not have it impact performance for deployments
> > that don't use it.
> 

> > Thanks.
> 

> > --
> 

> > Andrig (Andy) Miller
> 
> > Global Platform Director for JBoss Middle-ware
> 
> > Red Hat, Inc.
> 

> > _______________________________________________
> 
> > wildfly-dev mailing list wildfly-dev at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/wildfly-dev
> 
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