[OT] JSF and JVM performance

[Jeff Bischoff <jb...@klkurz.com>]

I have noticed that Myfaces seems to perform better while running on the 
  Hotspot Client (default) jvm, rather than the Hotspot Server jvm. Have 
any of you noticed this too?

For example, I tested by having my application build a t:dataTable of 
over 5000 rows. I used JBoss 4.0.4 and ran with and without the -server 
jvm option. Memory usage was consistent between the runs, but execution 
time was vastly different.

Using the default client jvm, my dataTable displayed in 28 seconds.

Using the server jvm, my dataTable displayed in 83 seconds.

This seems a little counterintuitive to me, considering that this 
clearly is a "server" type process. Perhaps it is because so many 
objects are being created, and the client vm allocates memory and 
initializes faster.

Has anyone found a good reason to use the -server option, when running a 
JSF application?

Regards,

Jeff Bischoff
Kenneth L Kurz & Assoc

Re: [OT] JSF and JVM performance

[Jesse Sightler <je...@gmail.com>]

How many times did you run your performance test?  Were you timing the first
run, or timing some runs after giving it some stress and then a quick
breather? :)

If you were timing the first run, I wouldn't be surprised at all if the
-server mode were slower.

Thanks,
Jess


On 6/23/06, Jeff Bischoff <jb...@klkurz.com> wrote:
>
> I have noticed that Myfaces seems to perform better while running on the
>   Hotspot Client (default) jvm, rather than the Hotspot Server jvm. Have
> any of you noticed this too?
>
> For example, I tested by having my application build a t:dataTable of
> over 5000 rows. I used JBoss 4.0.4 and ran with and without the -server
> jvm option. Memory usage was consistent between the runs, but execution
> time was vastly different.
>
> Using the default client jvm, my dataTable displayed in 28 seconds.
>
> Using the server jvm, my dataTable displayed in 83 seconds.
>
> This seems a little counterintuitive to me, considering that this
> clearly is a "server" type process. Perhaps it is because so many
> objects are being created, and the client vm allocates memory and
> initializes faster.
>
> Has anyone found a good reason to use the -server option, when running a
> JSF application?
>
> Regards,
>
> Jeff Bischoff
> Kenneth L Kurz & Assoc
>
>
>