Jasper doesn't generate bytecode, it generates java code (i.e.
myjsp-generatedservlet.java). A regular java compiler is then used to compile that
into bytecode. The issue with Jasper, from what Craig was saying, is that it's a very
brute-force generation of the java servlet code. It doesn't do anything to recognize
multiply generated tags, etc. It just creates one big long service method which
results in slow JSP execution time.
Donnie
>>> [EMAIL PROTECTED] 03/22/01 09:44AM >>>
If Jasper is generating some inefficient code, would Jikes help?
----- Original Message -----
From: "James Cook" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, March 21, 2001 8:55 AM
Subject: RE: Performance of struts
> I find the 240ms delay satisfactory for most of my apps because the
business
> side logic usually takes longer to execute.
>
> I applaud WebLogic however for their timings. Especially (IIRC) since
> WebLogic is supposed to be 100% Java. I know that some other servers that
> churn JSP very well are hybrids. It would be interesting to look at the
> Jasper-generated source and see where optimizations can be done.
>
> jim
>
> > -----Original Message-----
> > From: Jeff Schnitzer [mailto:[EMAIL PROTECTED]]
> > Sent: Monday, March 19, 2001 11:24 PM
> > To: [EMAIL PROTECTED]
> > Subject: RE: Performance of struts
> >
> >
> > Struts should suffer the same performance issues as WebWork. There are
> > a handful of benchmarks here:
> >
> > http://sourceforge.net/docman/display_doc.php?docid=2243&group_id=14797#
> > Na96
> >
> > The relative performance on a tag-heavy benchmark:
> >
> > Tomcat 3.2: ~380 milliseconds
> > JRun 3.0: ~350 milliseconds
> > Resin 1.2.1: ~250 milliseconds
> > Orion 1.3.8: ~220 milliseconds
> > WebLogic Server 6.0: ~140 milliseconds
> >
> > Jeff
> >
> > >-----Original Message-----
> > >From: Eric Brown [mailto:[EMAIL PROTECTED]]
> > >Sent: Monday, March 19, 2001 7:58 PM
> > >To: '[EMAIL PROTECTED]'
> > >Subject: RE: Performance of struts
> > >
> > >
> > >I haven't done any comparisons recently, but I think Resin from
> > >www.caucho.com is very reasonably priced and written specifically with
> > >performance in mind (from what I can tell). I've written a
> > >Java based http
> > >proxy server before and I can tell you that from looking at some of the
> > >things Resin has done, they know where Java's performance
> > >bottlenecks are.
> > >(For example, they translate all socket streams into byte
> > >arrays instead of
> > >using strings, etc.) They have some performance comparisons on
> > >their web
> > >site.
> > >
> > >Others are:
> > >Orion - Know nothing about
> > >BEA WebLogic - Very expensive, complex to deploy and
> > >performance is mediocre
> > >according to my sources
> > >ATG Dynamo - Expensive but good for commerce if needed. They
> > >are focused on
> > >commerce, so probably not focused on performance.
> > >Netscape/iPlanet - I've heard the performance is not impressive
> > >IBM WebSphere - This is an up-and-coming competitor to
> > >WebLogic and ATG. It
> > >used to be buggy and is still expensive. Performance is
> > >unknown, but I would
> > >favor Resin as it comes with source and is less expensive.
> > >Jrun - Priced reasonably. Nice integration with other Allaire
> > >products. No
> > >special commerce features. I think it has had some
> > >compatibility problems,
> > >but it seems a good engine these days. All the same, I don't
> > >think you can
> > >get source and I haven't done performance tests.
> > >Enhydra - This is just Tomcat. They have their own framework
> > >that is less
> > >comprehensive than struts called XMLC. Its big advantage is
> > >that it does a
> > >better job of separating UI from code.
> > >
> > >I think to some degree, it is equally important to look at the
> > >JVM you are
> > >running on. Consider looking at the Volano report at
> > >http://www.volano.com/report.html.
> > >
> > >My team is using Tomcat/Forte for development and will use
> > >Resin/Apache for
> > >deployment.
> > >
> > >Eric
> > >
> > >-----Original Message-----
> > >From: James Howe [mailto:[EMAIL PROTECTED]]
> > >Sent: Monday, March 19, 2001 2:16 PM
> > >To: [EMAIL PROTECTED]
> > >Subject: Re: Performance of struts
> > >
> > >If Tomcat's performance is pretty awful, what are some JSP
> > >implementations
> > >(commercial or otherwise) that are particularly good?
> > >
> > >At 12:10 PM 3/19/2001 -0800, you wrote:
> > >
> > >>Struts based apps (or any app that uses custom tags heavily)
> > >are going to
> > >>be significantly impacted by the quality of the JSP
> > >implementation in your
> > >>container. Which version are you using? (NOTE: Tomcat's performance
> > >>w.r.t. JSP pages is pretty awful, for example).
> > >>
> > >> > Thanks!
> > >> > keith
> > >> >
> > >> >
> > >> >
> > >>
> > >>Craig McClanahan
> > >
> > >James W. Howe mailto:[EMAIL PROTECTED]
> > >Allen Creek Software, Inc. pgpkey:
> > >http://ic.net/~jwh/pgpkey.html
> > >Ann Arbor, MI 48103
> > >
> >
>
>
