RE: JIT and class loaders

["Richards, Etienne (CAP, PTL)" <Etienne.Richards@xxxxxxxxxx>]

David,

At one of the IBM user group meetings the IBM speaker said that CRTJVAPGM
works for all code that is run from Q Shell that uses the IBM class loader,
it does not help if you use your own custom class loader. In Websphere
CRTJVAPGM only helps for classes that are in the system class path. If the
class/jar file is in the class path of the WebSphere Web Application or
loaded through the Invoker then CRTJVAPGM does not come into play.

Does anybody else know more about this.

Etienne

-----Original Message-----
From: Mark Phippard [mailto:MarkP@softlanding.com]
Sent: Tuesday, January 08, 2002 2:37 PM
To: java400-l@midrange.com
Subject: Re: JIT and class loaders



David,

I remember hearing that only the system class loaded recognizes the
CRTJVAPGM program object.  All other class loaders have to use a JIT
compiler.

Mark





                    "David Morris"
                    <David.Morris@plum       To:
<JAVA400-L@midrange.com>
                    creek.com>               cc:
                    Sent by:                 Subject:     JIT and class
loaders
                    java400-l-admin@mi
                    drange.com


                    01/08/02 02:17 PM
                    Please respond to
                    java400-l






Group,

I searched the iSeries FAQs and can't find a clear description of when
the JVM supports Jar and Class files created using CRTJVAPGM. I am
assuming that if I use a custom class loader (almost any Servlet
container) that the iSeries JVM will have to fall back to the JIT
optimizations if available. Is that true? Also, is inlining possible
with the JIT compiler and does the -O compile option have any affect?

Thanks,

David Morris
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