[Webwork-user] Re: Re[2]: Re: Performance of ParameterAware

[Harvey K. <ha...@ka...>]

I also have this problem.

Running under JBoss 2-4-6 Tomcat 4.0.3 on Win2K.  Pages with large number of
items in a
dropdown box take ages to display.  Show stopper...

"Peter Kelley" <pe...@mo...> wrote in message
news:147...@mo......
> Matt,
>
> The problem seems to be with including selectmap.jsp when there is a
> value selected that is obtained from the action. The performance
> slowdown is proportional to the number of items in the select list.
>
> For example we have a drop down that has the possible values for days
> in a month, the numbers 1 to 31. If the value of the control is set to
> today's date it consistently takes 9 seconds to execute. If we take
> out the code that sets the date it executes in a few milliseconds.
>
> By running our page in the debugger the method that seems to
> be taking all the time is:
>
>    rd.include(aContext.getRequest(), res);
>
> at line 54 in webwork.view.taglib.IncludeTag
>
> Since we are using JBoss 3.0 this all runs under Tomcat 4.0.3 - the
> only servlet container currently integrated with JBoss out of the box.
> We have tried Tomcat 4.0.4 integrated with JBoss with no better
> performance but Tomcat 4.0.4 standalone seems to be OK.
>
> I have attached a test case that demonstrates the problem. To run it
> unzip the files into a directory called test.war under the JBoss 3.0
> server directory of your choice and then browse to
> http://localhost:8080/test and follow the link. This page is taking 14
> seconds to draw the list control on my system.
>
> Friday, June 21, 2002, 10:19:55 PM, you wrote:
>
> MB> Can you submit a simple example that illustrates the problem?
>
> MB> -Matt
>
> MB> ----- Original Message -----
> MB> From: "Peter Kelley" <pe...@mo...>
> MB> To: "Chris Miller" <chr...@ho...>;
> MB> <web...@li...>
> MB> Sent: Friday, June 21, 2002 4:03 AM
> MB> Subject: Re: [Webwork-user] Re: Performance of ParameterAware
>
>
> >> Chris,
> >>
> >> I just managed to get a run in OptimizeIt and 95% of the time is being
> >> spent in java.lang.reflect.Array.newInstance(). Along with the fact
> >> that there are 10-20 getParameter calls for each control does this
> >> suggest anything to anybody ? The pattern seems to be:
> >>
> >> Get the control value from the method in the action
> >> Call getParameter on the action a few times very quickly
> >> Do something else that we are not logging, sometimes for a second or
> >> more.
> >> Get the next control value
> >> etc...
> >>
> >> Any ideas as to how we can solve this ?
> >>
> >> BTW, the reason we are using parameter aware is that we have input
> >> controls inside an iterator tag and we need to be able to get the
> >> values for each of the controls when the form is submitted (and
> >> display them if the same page is re-displayed). If there is another
> >> recommended way of doing this I would be interested in finding out.
> >> What would be really cool is if webwork supported indexed properties
> >> (a little used feature of Java beans) on actions but I can't see this
> >> documented anywhere. Should this be a feature request ?
> >>
> >> Thursday, June 20, 2002, 10:52:24 PM, you wrote:
> >>
> >> CM> Have you tried with Tomcat 4.0.4 and/or 4.1.5, or even better, a
> MB> different
> >> CM> servlet container (Orion, Resin, ...)? There have been changes in
the
> MB> latest
> >> CM> builds of Tomcat that can provide large performance improvements in
> MB> many
> >> CM> circumstances.
> >>
> >> CM> Also, it sounds like you've done some profiling - where is the
> MB> majority of
> >> CM> the time being spent?
> >>
> >> CM> Note that I'm not trying to discount the possibility of this being
a
> MB> WW
> >> CM> issue, just trying to help narrow down the source of the problem.
> >>
> >> CM> Regards,
> >> CM> Chris
> >>
> >> >> We have an admittedly complex JSP page that is taking between 20 and
> >> >> 30 seconds to load, even after a first view. There are 3 actions on
> >> >> the page in addition to the calling action but each of them is
taking
> >> >> 20-30 milliseconds to run. There appear to be a large number of
calls
> >> >> to the getParameter() method on the main action for each control on
> >> >> the page.
> >> >>
> >> >> Any ideas ?
> >> >>
> >> >> Jboss 3.0 with Tomcat 4.0.3
> >> >> Webwork 1.1
> >> >> Windows 2000 Professional
> >> >>
> >> >> --
> --
>
> regards,
> Peter Kelley
>
> MoveIt Pty Ltd
>
> "If you want to build a ship, don't drum up the men to
> gather wood, divide the work and give orders. Instead,
> teach them to yearn for the vast and endless sea."
> - Saint-Exupery